Bidentate Schiff base ligand 3-(3,4-Dihydroxy-phenyl)-2-[(4-dimethylamino-benzylidene)-amino]-2-methyl-propionic acid was prepared and characterized by spectroscopic techniques studies and elemental analysis. The Cd(II), Ni(II), Cu(II), Co(II), Cr(III),and Fe(III) of mixed-ligand complexes were structural explicate through moler conductance , [FT-IR, UV-Vis & AAS], chloride contents, , and magnetic susceptibility measurements. Octahedral geometries have been suggested for all complexes. The Schiff base and its complexes were tested against various bacterial species, two of {gram(G+) and gram(G-)} were shown weak to good activity against all bacteria.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Synthesis and Characterization of New Complexes of 2-(6-Methoxybenzo[d]thiazo...IOSR Journals
Abstract: The synthesis and characterization of manganese (ІІ), cobalt (ІІ), nickel (ІІ), copper (ІІ), zinc (ІІ), cadmium (ІІ) and mercury (ІІ) bidentate 2-(6-methoxybenzo[d]thiazol-2-ylamino)-2-phenyl acetonitrile ligand which was prepared from Benz aldehyde and 6-methoxybenzo[d]thiazol-2-amine in the presence of KCN and acidic medium. The complexes were synthesized by treating an ethanolic solution of the ligand with appropriate amount of metal salts [1:2] [M: L] ratio. The complexes were characterized by using metal and elemental chemical analysis, molar conductance, magnetic susceptibility measurements, FTIR , electronic spectral and mole ratio method. According to the obtained data the probable coordination geometries of manganese (ІІ), cobalt (ІІ), nickel (ІІ), copper (ІІ) zinc (ІІ), cadmium (ІІ) and mercury (ІІ) in these complexes are octahedral. All complexes were found to be non-electrolyte in absolute ethanol, and the complexes were formulated as [ML2Cl2] XH2O. Keywords: 2-(6-methoxybenzo[d]thiazol-2-ylamino)-2-phenyl acetonitrile, N2-donor, transition metals.
Graphene oxide grafted with iridium complex as a superior heterogeneous catal...Pawan Kumar
A novel graphene oxide (GO)-immobilized heteroleptic iridium complex was synthesized and demonstrated
as a first heterogenized homogeneous catalyst for the production of dimethylformamide (DMF)
from carbon dioxide, hydrogen, and dimethylamine. The synthesized hybrid catalyst showed comparable
activity as homogeneous heteroleptic iridium complex with additional benefits such as facile recovery
and recycling of the catalyst. After completion of the reaction, the heterogeneous catalyst was easily
recovered by filtration, and reused for subsequent recycling processes without any significant change in
the catalytic efficiency.
Graphene oxide grafted with iridium complex as a superior heterogeneous catal...Pawan Kumar
A novel graphene oxide (GO)-immobilized heteroleptic iridium complex was synthesized and demonstrated
as a first heterogenized homogeneous catalyst for the production of dimethylformamide (DMF)
from carbon dioxide, hydrogen, and dimethylamine. The synthesized hybrid catalyst showed comparable
activity as homogeneous heteroleptic iridium complex with additional benefits such as facile recovery
and recycling of the catalyst. After completion of the reaction, the heterogeneous catalyst was easily
recovered by filtration, and reused for subsequent recycling processes without any significant change in
the catalytic efficiency.
The photo-oxidation of Rhodamime B was carried out
in the presence of H2O2/ Fe2+ ion using UV light. The effects of
dye concentration, pH, H2O2 dose and Fe2+ dose. These
parameters strongly influenced the degradation of the dye. As
expected, the increase of initial dye concentration decreased the
percentage decoloration. Likewise increasing H2O2, Fe2+
concentration also increased the dye decoloration up to a certain
limit after which it starts decreasing. The optimum operating
conditions of the method were found to be [Dye] = 10mg/l; [H2O2]
= 300mg/l; [Fe2+] = 250 mg/l at pH 2. Under these conditions, a
maximum of 92% decoloration of the dye was achieved. The
actual breakdown of the dye was confirmed using HPLC
analyses.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Synthesis and Characterization of New Complexes of 2-(6-Methoxybenzo[d]thiazo...IOSR Journals
Abstract: The synthesis and characterization of manganese (ІІ), cobalt (ІІ), nickel (ІІ), copper (ІІ), zinc (ІІ), cadmium (ІІ) and mercury (ІІ) bidentate 2-(6-methoxybenzo[d]thiazol-2-ylamino)-2-phenyl acetonitrile ligand which was prepared from Benz aldehyde and 6-methoxybenzo[d]thiazol-2-amine in the presence of KCN and acidic medium. The complexes were synthesized by treating an ethanolic solution of the ligand with appropriate amount of metal salts [1:2] [M: L] ratio. The complexes were characterized by using metal and elemental chemical analysis, molar conductance, magnetic susceptibility measurements, FTIR , electronic spectral and mole ratio method. According to the obtained data the probable coordination geometries of manganese (ІІ), cobalt (ІІ), nickel (ІІ), copper (ІІ) zinc (ІІ), cadmium (ІІ) and mercury (ІІ) in these complexes are octahedral. All complexes were found to be non-electrolyte in absolute ethanol, and the complexes were formulated as [ML2Cl2] XH2O. Keywords: 2-(6-methoxybenzo[d]thiazol-2-ylamino)-2-phenyl acetonitrile, N2-donor, transition metals.
Graphene oxide grafted with iridium complex as a superior heterogeneous catal...Pawan Kumar
A novel graphene oxide (GO)-immobilized heteroleptic iridium complex was synthesized and demonstrated
as a first heterogenized homogeneous catalyst for the production of dimethylformamide (DMF)
from carbon dioxide, hydrogen, and dimethylamine. The synthesized hybrid catalyst showed comparable
activity as homogeneous heteroleptic iridium complex with additional benefits such as facile recovery
and recycling of the catalyst. After completion of the reaction, the heterogeneous catalyst was easily
recovered by filtration, and reused for subsequent recycling processes without any significant change in
the catalytic efficiency.
Graphene oxide grafted with iridium complex as a superior heterogeneous catal...Pawan Kumar
A novel graphene oxide (GO)-immobilized heteroleptic iridium complex was synthesized and demonstrated
as a first heterogenized homogeneous catalyst for the production of dimethylformamide (DMF)
from carbon dioxide, hydrogen, and dimethylamine. The synthesized hybrid catalyst showed comparable
activity as homogeneous heteroleptic iridium complex with additional benefits such as facile recovery
and recycling of the catalyst. After completion of the reaction, the heterogeneous catalyst was easily
recovered by filtration, and reused for subsequent recycling processes without any significant change in
the catalytic efficiency.
The photo-oxidation of Rhodamime B was carried out
in the presence of H2O2/ Fe2+ ion using UV light. The effects of
dye concentration, pH, H2O2 dose and Fe2+ dose. These
parameters strongly influenced the degradation of the dye. As
expected, the increase of initial dye concentration decreased the
percentage decoloration. Likewise increasing H2O2, Fe2+
concentration also increased the dye decoloration up to a certain
limit after which it starts decreasing. The optimum operating
conditions of the method were found to be [Dye] = 10mg/l; [H2O2]
= 300mg/l; [Fe2+] = 250 mg/l at pH 2. Under these conditions, a
maximum of 92% decoloration of the dye was achieved. The
actual breakdown of the dye was confirmed using HPLC
analyses.
Mannich Synthesis Under Ionic Liquid [Et3NH][HSO4] CatalysisIOSRJAC
Ionic liquid [Et3NH][HSO4] was found to be a particularly efficient catalyst for the synthesis of β- amino carbonyl pyrimidines through the Mannich condensation reaction of substituted pyrimidin-2(1H)-ones, cyclohexanone and 4-fluro/chlorobenzaldehyde under ultrasonic irradiation at room temperature. The present methodology offers several advantages such as excellent yields, simple procedure and mild conditions.
STUDY OF A CATALYST OF CITRIC ACID CROSSLINKING ON LOCUST BEAN GUMUniversitasGadjahMada
HCl, H2SO4, and potassium persulfate (PPS) were studied as catalysts of the process of citric acid (CA) crosslinking on
locust bean gum (LBG). The copolymer (CA-c-LBG) obtained was characterized by its viscosity, pH, FTIR, NMR and SEM.
It was found that the protonation of the hydroxyl groups at C6 atom of mannose and galactose in LBG and the hydrogen
atoms of CA carboxylic group was accelerated. The best catalytic effect was obtained in presence of HCl.
Synthesis and characterization of some metal complexes of 2- Phenyl-3,4-dihyd...IOSRJAC
2-Phenyl-3,4-dihydro-quinazolin-4-yloxy)-acetic acid (L1) metal complexes with Mn2+ , Co2+, Ni2+ Cu2+ , and Zn2+ ions were studied and the structure of the complexes were elucidated using elemental analyses, infrared (IR), 1H nuclear magnetic resonance (NMR), magnetic moment and thermal analysis measurements. Besides the characterization of complexes by physicochemical technique, Biological activities of the synthesized complexes were examined against some microbial strains for evaluation of antibacterial and antifungal activities.
This PDF presentation describes briefly my research experiences in synthetic organic. The time period of these research projects range from 1999 to 10/2005. Projects of later positions were also included but not all. Time period, place of work and position were mentioned at the beginning of each project. To noted that all the experimental synthesis, separation/purification, characterization and spectral interpretation were performed independently by me.
Synthesis, Characterization and Antibacterial Activity of New Complexes of So...IOSR Journals
Complexes of some lanthanide picrates (Ln3+ = Pr3+, Nd3+ and Dy3+) with benzo-18-crown-6 and 221-cryptand were synthesized and characterized by elemental analysis, FTIR, and UV-Visible. Spectrophotometric methods, thermal analysis (TGA & DTG), melting point, magnetic susceptibility and molar conductance. Also an in-vitro study on gram positive (Staphylococcus aureus) and gram negative bacteria (Escherichia coli, Salmonella and pseudomonas aeruginosa) was performed and the results were compared to those of the broad spectrum antibiotic Chloramphinicol. The benzo-18-crown-6 complexes have the general formula of [Ln.L.(Pic)2]Pic.nH2O , where; (Ln3+ = Pr3+, Nd3+, and Dy3+) , (L = Benzo-18-crown-6) , (Pic = Picrate anion) , (n = 1-2). In these complexes two picrate anions are coordinated to the metal ion through the phenolic oxygen and oxygen of the ortho nitro group, thus, the metal ions in these complexes have a coordination number of (10). The complexes of 221-cryptand have the general formula of [Ln.L.(Pic)]Pic2.nH2O where; (Ln3+ = Pr3+, Nd3+, and Dy3+), (L = 221-cryptand), (Pic = Picrate anion), (n = 1,2 or 7). In these complexes one picrate anion is coordinated to the metal ion, also through the phenolic oxygen and the oxygen from the ortho nitro group, thus the metal ions in the cryptand complexes have a coordination number of (9).
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
All manuscripts are subject to rapid peer review. Those of high quality (not previously published and not under consideration for publication in another journal) will be published without delay.
Complexation, Spectroscopic, Thermal, Magnetic And Conductimetric Studies On ...IOSR Journals
7-hydroxy-4-methyl-8-(phenylazo) coumarin (L1)and 7-hydroxy-4-methyl-8-(o-carboxyphenylazo) coumarin (L2) have been prepared and characterized by elemental analysis, infrared (IR), proton nuclear magnetic resonance (1H NMR) and Mass spectra. The important infrared (IR) spectral bands corresponding to the active groups in the two ligands and the solid complexes under investigation were studied. Also the important fragments in the ligands and the complexes were done using mass spectra and the main peaks were corresponding to the molecular weights of the ligands and complexes. The solid complexes have been synthesized and studied by elemental and thermal analyses (TG and DTA) as well as by IR, 1H NMR, magnetic measurements, electronic transition, molar conductance, mass spectra and electron spin resonance (ESR) spectra. The proposed steriochemical structures for the investigated metal complexes suggest octahedral geometry with respect to Mn, Co, Ni, Cu and Zn metal ions and all of the formed complexes contain coordinated and hydrated water molecules. All of the prepared solid complexes behave as non-electrolytes in chloroform.
Synthesis and characterization of resin copolymer derived from cardanol-furfu...ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A ruthenium-carbamato-complex derived from a siloxylated amine and carbon dio...Pawan Kumar
The rutheniumcarbamate complex derived from3-trimethoxysilyl-1-
propyl amine and carbon dioxidewas found to be a novel catalyst for
the oxidative cyanation of aromatic and cyclic tertiary amines to
corresponding a-amino nitriles in high to excellent yields by using
hydrogen peroxide and molecular oxygen as enviro-economic
oxidants. The developed protocol suggested an efficient alternative
for recycling carbon dioxide.
A new Schiff base 4-chlorophenyl)methanimine
(6R,7R)-3-methyl-8-oxo-7-(2-phenylpropanamido)-5-thia-1-
azabicyclo[4.2.0]oct-2-ene-2-carboxylate= (HL)= C23H20
ClN3O4S) has been synthesized from β-lactam antibiotic
(cephalexin mono hydrate(CephH)=(C16H19N3O5S.H2O) and 4-
chlorobenzaldehyde . Figure(1) Metal mixed ligand complexes
of the Schiff base were prepared from chloride salt of
Fe(II),Co(II),Ni(II),Cu(II),Zn(II) and Cd (II), in 50% (v/v)
ethanol –water medium (SacH ) .in aqueous ethanol(1:1)
containing and Saccharin(C7H5NO3S) = sodium hydroxide.
Several physical tools in particular; IR, CHN, 1H NMR, 13C
NMR for ligand and melting point molar conductance, magnetic
moment. and determination the percentage of the metal in the
complexes by flame(AAS). The ligands and there metal
complexes were screened for their antimicrobial activity against
four bacteria (gram + ve) and (gram -ve) {Escherichia coli,
Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus}.
The proposed structure of the complexes using program, Chem
office 3D(2006). The general formula have been given for the
prepared mixed ligand complexes Na2[M(Sac)3(L)], M(II) = Fe
(II), Co(II) , Ni(II), Cu (II), Zn(II) , and Cd(II).
HL= C29H24 ClN3O4S, L= C29H23 ClN3O4S -.
Mannich Synthesis Under Ionic Liquid [Et3NH][HSO4] CatalysisIOSRJAC
Ionic liquid [Et3NH][HSO4] was found to be a particularly efficient catalyst for the synthesis of β- amino carbonyl pyrimidines through the Mannich condensation reaction of substituted pyrimidin-2(1H)-ones, cyclohexanone and 4-fluro/chlorobenzaldehyde under ultrasonic irradiation at room temperature. The present methodology offers several advantages such as excellent yields, simple procedure and mild conditions.
STUDY OF A CATALYST OF CITRIC ACID CROSSLINKING ON LOCUST BEAN GUMUniversitasGadjahMada
HCl, H2SO4, and potassium persulfate (PPS) were studied as catalysts of the process of citric acid (CA) crosslinking on
locust bean gum (LBG). The copolymer (CA-c-LBG) obtained was characterized by its viscosity, pH, FTIR, NMR and SEM.
It was found that the protonation of the hydroxyl groups at C6 atom of mannose and galactose in LBG and the hydrogen
atoms of CA carboxylic group was accelerated. The best catalytic effect was obtained in presence of HCl.
Synthesis and characterization of some metal complexes of 2- Phenyl-3,4-dihyd...IOSRJAC
2-Phenyl-3,4-dihydro-quinazolin-4-yloxy)-acetic acid (L1) metal complexes with Mn2+ , Co2+, Ni2+ Cu2+ , and Zn2+ ions were studied and the structure of the complexes were elucidated using elemental analyses, infrared (IR), 1H nuclear magnetic resonance (NMR), magnetic moment and thermal analysis measurements. Besides the characterization of complexes by physicochemical technique, Biological activities of the synthesized complexes were examined against some microbial strains for evaluation of antibacterial and antifungal activities.
This PDF presentation describes briefly my research experiences in synthetic organic. The time period of these research projects range from 1999 to 10/2005. Projects of later positions were also included but not all. Time period, place of work and position were mentioned at the beginning of each project. To noted that all the experimental synthesis, separation/purification, characterization and spectral interpretation were performed independently by me.
Synthesis, Characterization and Antibacterial Activity of New Complexes of So...IOSR Journals
Complexes of some lanthanide picrates (Ln3+ = Pr3+, Nd3+ and Dy3+) with benzo-18-crown-6 and 221-cryptand were synthesized and characterized by elemental analysis, FTIR, and UV-Visible. Spectrophotometric methods, thermal analysis (TGA & DTG), melting point, magnetic susceptibility and molar conductance. Also an in-vitro study on gram positive (Staphylococcus aureus) and gram negative bacteria (Escherichia coli, Salmonella and pseudomonas aeruginosa) was performed and the results were compared to those of the broad spectrum antibiotic Chloramphinicol. The benzo-18-crown-6 complexes have the general formula of [Ln.L.(Pic)2]Pic.nH2O , where; (Ln3+ = Pr3+, Nd3+, and Dy3+) , (L = Benzo-18-crown-6) , (Pic = Picrate anion) , (n = 1-2). In these complexes two picrate anions are coordinated to the metal ion through the phenolic oxygen and oxygen of the ortho nitro group, thus, the metal ions in these complexes have a coordination number of (10). The complexes of 221-cryptand have the general formula of [Ln.L.(Pic)]Pic2.nH2O where; (Ln3+ = Pr3+, Nd3+, and Dy3+), (L = 221-cryptand), (Pic = Picrate anion), (n = 1,2 or 7). In these complexes one picrate anion is coordinated to the metal ion, also through the phenolic oxygen and the oxygen from the ortho nitro group, thus the metal ions in the cryptand complexes have a coordination number of (9).
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
All manuscripts are subject to rapid peer review. Those of high quality (not previously published and not under consideration for publication in another journal) will be published without delay.
Complexation, Spectroscopic, Thermal, Magnetic And Conductimetric Studies On ...IOSR Journals
7-hydroxy-4-methyl-8-(phenylazo) coumarin (L1)and 7-hydroxy-4-methyl-8-(o-carboxyphenylazo) coumarin (L2) have been prepared and characterized by elemental analysis, infrared (IR), proton nuclear magnetic resonance (1H NMR) and Mass spectra. The important infrared (IR) spectral bands corresponding to the active groups in the two ligands and the solid complexes under investigation were studied. Also the important fragments in the ligands and the complexes were done using mass spectra and the main peaks were corresponding to the molecular weights of the ligands and complexes. The solid complexes have been synthesized and studied by elemental and thermal analyses (TG and DTA) as well as by IR, 1H NMR, magnetic measurements, electronic transition, molar conductance, mass spectra and electron spin resonance (ESR) spectra. The proposed steriochemical structures for the investigated metal complexes suggest octahedral geometry with respect to Mn, Co, Ni, Cu and Zn metal ions and all of the formed complexes contain coordinated and hydrated water molecules. All of the prepared solid complexes behave as non-electrolytes in chloroform.
Synthesis and characterization of resin copolymer derived from cardanol-furfu...ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A ruthenium-carbamato-complex derived from a siloxylated amine and carbon dio...Pawan Kumar
The rutheniumcarbamate complex derived from3-trimethoxysilyl-1-
propyl amine and carbon dioxidewas found to be a novel catalyst for
the oxidative cyanation of aromatic and cyclic tertiary amines to
corresponding a-amino nitriles in high to excellent yields by using
hydrogen peroxide and molecular oxygen as enviro-economic
oxidants. The developed protocol suggested an efficient alternative
for recycling carbon dioxide.
A new Schiff base 4-chlorophenyl)methanimine
(6R,7R)-3-methyl-8-oxo-7-(2-phenylpropanamido)-5-thia-1-
azabicyclo[4.2.0]oct-2-ene-2-carboxylate= (HL)= C23H20
ClN3O4S) has been synthesized from β-lactam antibiotic
(cephalexin mono hydrate(CephH)=(C16H19N3O5S.H2O) and 4-
chlorobenzaldehyde . Figure(1) Metal mixed ligand complexes
of the Schiff base were prepared from chloride salt of
Fe(II),Co(II),Ni(II),Cu(II),Zn(II) and Cd (II), in 50% (v/v)
ethanol –water medium (SacH ) .in aqueous ethanol(1:1)
containing and Saccharin(C7H5NO3S) = sodium hydroxide.
Several physical tools in particular; IR, CHN, 1H NMR, 13C
NMR for ligand and melting point molar conductance, magnetic
moment. and determination the percentage of the metal in the
complexes by flame(AAS). The ligands and there metal
complexes were screened for their antimicrobial activity against
four bacteria (gram + ve) and (gram -ve) {Escherichia coli,
Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus}.
The proposed structure of the complexes using program, Chem
office 3D(2006). The general formula have been given for the
prepared mixed ligand complexes Na2[M(Sac)3(L)], M(II) = Fe
(II), Co(II) , Ni(II), Cu (II), Zn(II) , and Cd(II).
HL= C29H24 ClN3O4S, L= C29H23 ClN3O4S -.
Spectral studies of 5-({4-amino-2-[(Z)-(2-hydroxybenzylidene) amino] pyrimidi...IOSR Journals
Some transition metal ions Complexes with 5-({4-amino-2-[(Z)-(2-hydroxybenzylidene) amino]
pyrimidin-5-yl} methyl)-2,3,4-trimethoxybenzene were prepared and characterized by elemental analyses,
Infrared , magnetic moment, electronic spectra , mass spectra, X-ray powder diffraction, molar conductance
and thermal analysis (TGA). The complexes have general formulae [ML2.2H2O] {where M = Mn (II), Co (II), Ni
(II), Cu (II), Zn (II), Pd (II) and Pt (II). The coordination behavior of the metal ions towards to the investigated
Schiff base takes place through –C=N,-NH2 and –OH groups. The obtained C, H and N elemental analysis data
showed the Metal: Ligand ratio is 1:2 [M: L] ratio. The molar conductance data reveal that all the metal
complexes are non-electrolytic in nature. From the magnetic moments the complexes are paramagnetic except
Zn metal ion complexes have octahedral geometry with coordination number eight. The thermal behavior of
these complexes shows that, the hydrated complexes have loses two water molecules and immediately followed
by decomposition of the anions and ligand molecules in the second and third stage. The Schiff bases and metal
complexes show good activity against some bacteria. The antimicrobial results indicate that, the metal
complexes have better antimicrobial activity as compared to the prepared Schiff base.
METALLO - BIOACTIVE COMPOUNDS AS POTENTIAL NOVEL ANTICANCER THERAPYijac123
Mono and bi-organometallic complexes of Cu(II), Ni(II), Mn(II), Zn(II) and Ag(I) complexes with
oxaloamide ligand has much potential as therapeutic and diagnostic agents. The ligand allows the
thermodynamic and kinetic reactivity of the metal ion to be controlled and also provide a scaffold for
functionalization. Specific examples involving the design of metal complexes as anticancer agents are
discussed. These complexes have been synthesized and characterized by (1H-NMR, mass, IR, UV-VIS,
ESR) spectra, magnetic moments and conductance measurements, elemental and thermal analyses. Molar
conductances in DMF solution indicates that, the complexes are non-electrolytes. The ESR spectra of solid
Cu(II) complexes (2-5) show an axial type indicating a d(X2-y2) ground state with a significant covalent
bond character. However, Mn(II) complex(9), shows an isotropic type indicating an octahedral geometry.
Cytotoxic evolution IC50 of the ligand and its complexes have been carried out. Cu(II) Complexes show
enhanced activity in comparison to the parent ligand or standard drug. Copper is enriched in various
human cancer tissues and is a co-factor essential for tumor angiogenesis processes. However, the use of
copper binding ligand to target tumor, copper could provide a novel strategy for cancer selective
treatment.
Design, Synthesis and Structural Inspection of Some Novel Di- And Tri-Azometh...CrimsonPublishersACSR
In this study, NBA imine compound was synthesized via an easy one-pot condensation of 3-nitro-benzaldyhide with 2-amino benzoic acid in 1:1 ratio and DAPH imine compound derived from 2,6-diacetyl pyridine and phenyl hydrazine hydrochloride. Consequences of the newly synthesized compounds
hooked up with the aid of FT-IR, elemental analyses, 13C-NMR ,1H-NMR and digital spectral research.
Experiments had been consistent with their chemical structures. Theoretical DFT calculations had been
implemented to confirm the molecular geometry of the investigated chemo-sensors. The sensor property
of all organized imines had been tested upon addition of the metal ions, consisting of Cr(III) ,Fe(II) ,Co(II) ,
Ni(II) ,Cu(II) ,Zn(II) ,Mn(II), VO(II) and Pd(II) .The interactions among receptors and ions are effortlessly
monitored with the aid of UV-visible spectroscopy. DAPH receptor confirmed color modification from
blood red to excessive deep green color to Co(II) ,a yellow color to Cu(II) and different colors to different
ions. Where the NBA receptor showed color modification from light yellow to excessive deep orange color
to Fe(II), pale orange to Pd(II) and different colors for other ions.
Polycondensation of Ethylenediaminetetraacetic Acid with SomeTaghreed Al-Noor
Many condensed polymers [A1-A7] were prepared via reaction of (Ethylenediaminetetraacetic acid = EDTA),
with different prepared imide-diamines by modification [ modification of amino acids and antibiotics (B1-
B7)]
Imide-diamines were prepared by chlorination of L-amino acids such as
[ L-Histidine, L-Alanine, L-Valine, L-Glycine and L-Aspargine ] or selected antibiotics such as [Cephallixine
monohydrate and Amoxilline ] with thionyl chloride at 0°C, then reacted with ammonia to obtain imidediamines
[B1-B7] .
The physical properties of all prepared condensed polymers [A1-A7], new prepared diamines [B1-B7] were
studied and characterized by FT -IR spectroscope to certify the structural formulas.
The thermal analysis (TGA, DTA) were studied, and the intrinsic viscosities were measured at 30°C using
Ostwald viscometer.
Synthesis, characterization, antimicrobial, anticancer and antidiabetic activ...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Kinetics and Thermodynamics of Mandelic Acid Oxidation By Tripropylammonium H...inventionjournals
Two new Versatile reagent Tripropylammonium Fluorochromate(TriPAFC) and Tripropylammonium Chlorochromate(TriPACC) has been employed for the oxidation of Mandelic acid. Rate of the réaction is catalysed by surfactant Sodium LaurylEther Sulphate(SLES). The Oxidation has been studied spectrophotometrically at room température in perchloric acid medium. Rate of TriPAFC and TriPACC oxidation of Mandelic acid has been followed under pseudo-first order condition. Rate constants were calculated by the integrated rate equation. The graph of logk versus time was linear and the slope is near to unity, rate constant calculated from graph also agreed with experimental value shows the first order rate dépendance on Mandelic acid. Product formed in this oxidation of Mandelic acid was analysed, polymerization test were carried to confirm that the reaction follows ionic mechanism and stoichiometric data has been accounted.Temperature of the substrate is varried and from the rate constant value, Thermodynamic parameters like Activation energy, Enthalpy change, Entropy change and change in Gibb’s free energy is calculated using Arrhenius and Eyrings plot. All the kinetic runs were repeated and the rate constants were reproducible within ±2% range.
Mixed Ligand, Palladium(II) and Platinum(II) Complexes of Tertiary Diphosphin...Karwan Omer
Palladium(II) and platinum(II) complexes containing the mixed ligands tertiary
diphosphinesdppm. dppp and dppf with Thioester ligand S-1H benzo[d] imidazole-2-yl benzothioate
(HSBIBT) have been prepared by the reaction of PdCl2 and PtCl2 with one equiv of tertiary
diphosphines ligands to form [Pd(k2-dppf)Cl2], [Pd(k2-dppp)Cl2] and [Pt(k2-dppmCl)Cl2] complexes
and then add the ligand HSBIBT to these complexes to form mixed ligand complexes. The prepared
complexes have been characterized by single-crystal X-ray diffraction, elemental analysis, magnetic
susceptibility, molar conductance, IR spectral data and UV-Visible. The results suggested that the
ligand HSBIBT bonded to the metal through N atom and square planner geometries were assigned
for the complexes.
Reaction of aniline with ammonium persulphate and concentrated hydrochloric a...Maciej Przybyłek
In this paper, the reaction of aniline with ammonium persulphate and concentrated HCl was studied. As a result of our experimental studies, 2,4,6-trichlorophenylamine was identified as the main product. This shows that a high concentration of HCl does not favour oxidative polymerisation of phenylamine, even though the ammonium persulphate/HCl system is widely used in polyaniline synthesis. On the basis of the experimental data and density functional theory for reaction path modelling, we proposed a mechanism for oxidative chlorination of aniline. We assumed that this reaction proceeded in three cyclically repeated steps; protonation of aniline, formation of singlet ground state phenylnitrenium cation, and nucleophilic substitution. In order to confirm this mechanism, kinetic, thermochemical, and natural bond orbital population analyses were performed.
Azomethine Metal Chelates as an Efficient Catalyst for Oxidation of Organic C...CrimsonPublishersACSR
Azomethine ligands and their metal chelates are flexible compounds synthesized from the condensation
of an amino compound with carbonyl compounds and extensively used for industrial purposes and also
show a broad range of biological efficiencies including antibacterial, antifungal, antiviral, antimalarial,
antiproliferative, anti-inflammatory, anticancer, anti-HIV, anthelminthic and antipyretic properties.
Azomethine metal chelates show excellent catalytic activity in diversity reactions. Over the past few
years, there have been many reports on their applications in homogeneous and heterogeneous catalysis.
The high thermal and moisture stabilities of many azomethine metal chelates were useful attributes for
their application as catalysts in reactions involving at high temperatures. Recent researches in oxidation
catalysis have focused on how to employ the metal-catalyzed oxidation of organic substrates. This review
concerns with the current developments for the oxidations of organic compounds.
Shanghai ranking's global ranking of academic subjects 2020 chemistry convertedTaghreed Al-Noor
Shanghai Ranking's Global Ranking of Academic Subjects 2020 – Chemistry
http://www.shanghairanking.com/Shanghairanking-Subject-Rankings/chemistry.html
2020 تصنيف شنغهاي للجامعات حسب الموضوع – الكيمياء
Shanghai Ranking's Global Ranking of Academic Subjects 2020 Chemistry
prof .Taghreed H Al-Noor أ. د تغريد هاشم النور
جامعة بغداد University of Baghdad
that causes COVID-19 is called SARS-CoV
2020 - www.compoundchem.com @
prof .Taghreed H Al-Noor أ.د تغريد هاشم النور
University of Baghdad,Chair ACS Iraq chapter
Virtual International Scientific Conference Curriculum The Role Of Higher Education And Scientific Research Formations And National Institutions In Confronting The Corona Pandemic Forensic DNA Center for Research and Training / Al-Nahrain University .American Chemical Society ACS and its role in confronting Corona pandemic )
Prof. Taghreed Hashim Al.Noor Chairman chapter Iraq of the American Chemical Society
Asian Journal of Biochemistry is an International peer-reviewed journal dedicated to publish the results of original research in form of original articles, reviews and short communications. Scope of the journal includes: Structure, function and regulation of biologically active molecules; gene structure and expression; biochemical mechanisms; protein biosynthesis; protein folding; membrane structure-function relationships; bioenergetics and immunochemistry. Asian Journal of Biochemistry now accepting new submissions. Submit your next paper via online submission system.
ACS Iraq chapter
Supported
45Mins5th International Turkic World
Conference on Chemical Sciences and
Technologies (ITWCCST 2019)” which will take place in Sakarya,
Turkey between 25-29 October 2019.
1SecondScientific Committee
Taghreed H AL-NOOR
University of Baghdad, Iraq chair ACS IRAQ member in
http://2019.itwccst.org/?page_id=149
Catalysis, chemical engineering 2019 taghreed al noorTaghreed Al-Noor
Synthesis, spectroscopic characterization, biological Activity and dye on
cotton fabric of mixed ligand metal complexes derived From curcumin and Lphenyl alanine, schiff Base and anthranilic acid
DFT, cytotoxicity and molecular docking studies of (E)-2((2- hydroxybenzylide...Taghreed Al-Noor
Kathmandu Symposia on Advanced Materials (KaSAM)-2018; October 26-29, 2018, Kathmandu, Nepal
DFT, cytotoxicity and molecular docking studies of (E)-2((2-
hydroxybenzylidene) amino-3-mercaptopropanoic acid and its Co(II),
Ni(II) and Cu(II) complexes
M.M. El-ajaily1*, S.S. Mahmoud2, R.N. El-daghare1, A.K. Sarangi3, R.K. Mohapatra3* and T.H.
Al-Noor4
1Chemistry Department, Faculty of Science, Benghazi University, Benghazi, Libya
2Chemistry department, Faculty of Science, Cairo University, Giza, Egypt
3Department of Chemistry, Government College of Engineering, Keonjhar, Odisha, India
4Chemistry Department, Ibn-Al-Haithem College of Education for Pure Science, Baghdad University,
Baghdad, Iraq
*E-mail: ranjank_mohapatra@yahoo.com
The cytotoxicity studies of a Schiff base; (E)-2((2-hydroxybenzylidene)amino-3-mercaptopropanoic acid
(HL) derived from the condensation of 2-hydroxybenzaldehyde and L-cysteine and its Co(II), Ni(II)
and Cu(II) complexes have been reported against four cancer cell lines. The evaluation of the growth
inhibitory on human cancer cells is studied for the chelates against HCT-116, MCF-7, HFB-4,
HepG-2 cell lines. The obtained results (Fig. 1) revealed that the compounds are active against human
hepatocellular carcinoma cell line (HepG-2).
Scimago journal & country rank taghreed al noorTaghreed Al-Noor
Scimago Journal & Country Rank
ترتيب الدول من ناحية نشر الباحثين في المجلات العالمية المصنفة و
H index جودة البحوث من خلال عدد الاقتباسات
حسب موقع
)SJR (Scimago Journal Rank الترتيب خاص بسنة 201
ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society ACS GCCE Chemical Society Capacity Building Workshop Capacity Building Workshop Capacity Building Workshop Capacity Building Workshop Capacity Building Workshop Capacity Building Workshop Capacity Building Workshop 14 -18 October, 2018 October, 2018October, 2018 October, 2018
•
Anthranillic acid and tributylphosphine4652 6725-1-pbTaghreed Al-Noor
Mixed ligand complexes of bivalent metal ions, viz; Co(II), Ni(II), Cu(II) and Zn(II) of the
composition [M(A)2((PBu3)2]in(1:2:2)(M:A:(PBu3). molar ratio, (where A- Anthranilate ion
,(PBu3)= tributylphosphine. M= Co(II),Ni(II),Cu(II) and Zn(II).
The prepared complexes were characterized using flame atomic absorption, by FT-IR,
UV/visible spectra methods as well as magnetic susceptibility and conductivity measurements. The
metal complexes were tested in vitro against three types of pathogenic bacteria microorganisms:
(Staphylococcus, Klebsiella SPP .and Bacillas)to assess their antimicrobial properties. Results. The
study shows that all complexes have octahedral geometry; in addition, it has high activity against
tested bacteria. Based on the reported results, it may be concluded that.The results showed that the
deprotonated ligand(nthranilc acid ) to anthranilate ion (A-) by using (KOH) coordinated to metal
ions as bidentate ligand through the oxygen atom of the carboxylate group (−COO−), and the
nitrogen atom of the amine group (-NH2), where the Tributylphosphine coordinated as a
3rd Internatioanl Medical Congress, will be hold in Kerbala, Iraq in 14-15 De...Taghreed Al-Noor
3rd Internatioanl Medical Congress, will be hold in Kerbala, Iraq in 14-15 December 2018 by Nab'a Al-Hayat Foundation for Medical Sciences and Health Care, and in collaboration with (University of Kerbala, University of Kufa, Directory of Research -Ministry of Health Oman, University of Sussex, University of Komar, University of Diyala, University of Qaddisya, University of Al-Anbar, University of Al-Mustansariya and Helal Iran Pharmaceutical Complex.
Facial Acne Therapy by Using Pumpkin Seed Oil with Its Physicochemical Proper...Taghreed Al-Noor
The herbal remedy individually or in combination with standard medicines has been used in diverse medical treatises for the cure of different diseases. Pumpkin seed oil is one of the recognized edible oil and has substantial medicinal properties due to the presence of unique natural edible substances. Inflammation is an adaptive response that is triggered by noxious stimuli and conditions, which involves interactions amongst many cell types and mediators, and underlies many pathological processes. Unsaturated fatty acids (UFAs) can influence inflammation through a variety of mechanisms, and have been indicated as alternative anti-inflammatory agents to treat several inflammatory skin disorders. Pumpkin seed oil is rich in (UFAs), that its topical anti-inflammatory properties have been investigated. For that reason, the goal of this article was to evaluate the effects of pumpkin seed oil on acute and chronic cutaneous inflammation experimental models. The extracted pumpkin seed oil had an acceptable initial quality, when it was extracted using soxhlet extraction method and was characterized using standard methods .The physicochemical parameters of purified oil were determined. The boiling point of pumpkin seed oil was (158.90 oC) that equal to the values obtained in literature for some oil seeds, but lower than the boiling point of the oils studied, plus the melting point of pumpkin seed oil was (15.39 oC) that lead to a characteristic in cold cream manufacture. The iodine value was (104 ± 0.03 mg of KOH/g) of oil, indicated a high degree of unsaturation. The saponification value was (181± 3.2 mg KOH/g), this value indicated the pumpkin seed oil had fatty acids with higher number of carbon atoms. As a final point, the acid value was
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
TESDA TM1 REVIEWER FOR NATIONAL ASSESSMENT WRITTEN AND ORAL QUESTIONS WITH A...
1797 1-3521-2-10-20180530
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Chemistry|240
Synthesis, Spectral and Bacterial Studies of Mixed Ligand
Complexes of Schiff Base Derived from Methyldopa and
Anthranilic Acid with Some Metal Ions
Lekaa K. abdul karem
Taghreed. H. Al-Noor
Dept. of Chemistry/College of Education for Pure Science( Ibn Al-Haitham) /University of
Baghdad
dr.likaakhalid@gmail.com, orcid.org/0000-0002-0735-128X
drtaghreed2@gmail.com, orcid.org/0000-0002-6761-7131
Abstract
Bidentate Schiff base ligand 3-(3,4-Dihydroxy-phenyl)-2-[(4-dimethylamino-
benzylidene)-amino]-2-methyl-propionic acid was prepared and characterized by
spectroscopic techniques studies and elemental analysis. The Cd(II), Ni(II), Cu(II), Co(II),
Cr(III),and Fe(III) of mixed-ligand complexes were structural explicate through moler
conductance , [FT-IR, UV-Vis & AAS], chloride contents, , and magnetic susceptibility
measurements. Octahedral geometries have been suggested for all complexes. The Schiff
base and its complexes were tested against various bacterial species, two of {gram(G+) and
gram(G-)} were shown weak to good activity against all bacteria.
Key words: Bidentate Schiff Base, Methyldopa, Spectroscopic techniques, and bacterial
activities.
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Introduction
Coordination chemistry that related with the chelate or complexes got a large attention
[1-2]. Through chemical bonding as the recent studies the formula which involve of central
metal (Lewis acid ) and ligands (Lewis base) gives us a strong bond and very stable
compounds [3]. Schiff bases form stable complexes with some transition metal ions, and
they play an important role in general life with industries such as chemistry and biological
activities [4 -6]. Methyldopa, (M-dop) = (α-methyl-3,4-dihydroxyphenyl alanine) is one of
the catecholic molecules which are liable to interact with Fe (II). It is a catecholamine
used (anti-hypertensive drug) [7]. The stability constants (Ks) of (4 metals) with
(Nitrilotriacetic &/ or Iminodiacetic ) acids as primary ligands and (Methyldopa and/ or
levodopa) as secondary ligands potentiometrically[8]. The spectrophotometric
determination of dopamine .HCl and Methyldopa in pharmaceutical preparations using
flow injection analysis (FIA). The method is based on oxidative coupling reaction of drug
with 2-Furoic acid hydrazide (C5H6N2O2) in the presence of Sodium nitroprusside in
(NaOH) medium to form soluble product. The results obtained were in good agreement
with those obtained by British Pharmacopoeia method [9]. The stability constants of
ternary complexes of M(II) ions with two amini acids(aspartic acid(ASP) &Glutamic
(Glu) acid) as primary ligands and (levodopa & Methyldopa )as secondary ligands, also
all complexes have been carried out (pH-metrically) [10].
Experimental
All chemicals used in this research were purchased from BDH, Fluka and Merck
companies and used without moreover purification. The melting points were obtained
using "Stuart Melting Point Apparatus". The metal contents of the complexes were
obtained by atomic absorption technique using a "Shimadzu AA 620G ". The Chloride
contents of complexes were obtained by testing all complexes (0.05 gm.) which were
decomposed with conc. Nitric acid and diluted with water. The1
H and 13
C NMR spectra
were performed on by "Brucker DRX system 500 (500 MHz)", University of Tehran.
Elemental micro analysis CHNS was carried out by the Euro EA 3000, University of
Baghdad. UV-Vis spectra were performed on a "Shimadzu UV- 160A". The FTIR- spectra
were carried out by a "Shimadzu, FTIR- 8400S" (4000- 400) cm-1
with samples prepared as
KBr discs. Magnetic measurements were recorded on a "Bruker BM6 instrument" at 298K
following the Faraday’s method'
Ligand's Preparation (HL [11])
A solution of {4-DMBA} 1 mmole in methanol (10 ml) was added to a solution of {M-
Dopa} 1 mmole in methanol (20 ml) and then 1mmol of KOH. The mixture was refluxed
for 4~hours with stirring. The product was a deep orange solution. It was allowed to cool
and dry at room temperature, then recrystallized with ethanol. The brown colored solid
mass formed during refluxing was cooled at room temperature, filtered and washed
completely with hot ethanol, and recrystallized from acetone to get a pure sample .It yields
90% . The synthetic pathway is as shown in Scheme -1.
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Chemistry|242
O
HO
H3C
OH
OH
N
C H
N
H3C CH3
3-(3,4-Dihydroxy-phenyl)-2-[(4-dimethylamino-benzylidene)-amino]-2-methyl-propionic acid
C
O
H
N
H3C CH3
+
4-Dimethylamino-benzaldehyde
O
HO
H3C
OH
OH
NH2
Methyl dopa
HL
ref luxed f or 4~hours
Methanol
Scheme )1(: The preparation of the ligand (HL)
Preparation of potassium anthranilate {C7H6NO2K} :
potassium anthranilate ligand has been prepared depending on literature method[11].
A general method in preparation of complexes[11]:
In methanol solution (2mmol of C7H6NO2K ) and a solution of (HL & KOH) each one
is 1mmole were added to a stirred for (1 hour) solution of MClx.nH2O 1mmole. The
mixture was (filtered & precipitation) then washed several times with an surplus of ethanol
and dried during (24 hours) at room temperature The synthetic pathway is as shown in
Scheme -2.
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O
HO
OH
OH
N
C H
N
H3C CH3
H2N
O
O
H2N
O
O
O
O
HO
HO
N
CH
N
CH2HC
M
H3C
O
+K-O
H2N
2
Potassium anthralniate
+ + MCl2.nH2O
M= Co(II), Ni(II),Cu(II), and Cd(II)
reflux for (1 hour)
K
and
H2N
O
O
H2N
O
O
O
O
HO
HO
N
CH
N
CH3H3C
M
H3C
M=Cr(III),Fe(III)
K
HL
Methanol
Scheme )2(: The preparation of complexes
Results and Discussion
1. Physical Properties
The physical properties for the starting materials and Schiff base (HL) ligand are
given in Table (1a and 1b).
The complexes are soluble in (DMSO) & (DMF), while insoluble in water [12].
The melting points of ligands were lower than all complexes , Table -1c.
The conductivity measurement values in DMSO (10−3
Molar) solution range in
(31.4-38.1) Ω-1
cm2
mol-1
for Cd(II) ,Ni(II) ,Cu(II) , and Co(II), complexes. the
complexes are electrolytes types 1:1 as the data indicate , but the complexes
Cr(III)& Fe(III) were non-electrolytes [13].
Silver nitrate solution was (-) when we exanimated (Chloride ion)
The found and theory values of (M%) in each complex are in good agreement[14].
2. 1H-NMR spectrum for the ligand (HL)
The integral intensities ( δ ) in ppm of each signal in the 1
H-NMR spectrum of HL
Figure-1, was found to agree with the number of different types of protons present. The
signal obtained in range δ (6.44 -7.68) ppm was appointed for doublet due one proton of
aromatic ring of phenyl, the formation of Schiff base is supported by the presence of a
singlet at (δ 8.46) ppm corresponding to the azomethine proton
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(–N=CH). The signal obtained in range δ (7.10-7.70) ppm was appointed for doublet due
one proton of aromatic ring. (m, arom. proton,). The signals observed at δ (1.31 & 1.23)
ppm ascribed to methyl protons (-CH3) group4[15,16] .
3. 13C-NMR Spectrum for (HL)
The spectrum of [HL] in (DMSO-d6 solvent) is shown in Figure-2. Chemical shift [δ
ppm] azomethine H-C=N carbon (C1) at 195ppm. The carbon atoms of aromatic ring at
range (δ=130.25-139.24) ppm, note methyl carbon (3CH3) in Schiff base at (δ=41.72 ,41.51
and 41.09) and at δ=40.68 ppm is ascribed to methyl carbon (1CH3) of DMSO [15,16 ].
4. FTIR spectra:
Methyl dopa spectrum: The bands at (1490) cm-1
, (3105) cm-1
, (2956, 2808) cm-1
and
(1257) cm-1
were appointed to υ(C=C) aromatic, υ(C–H) aromatic, υ(C–H) aliphatic
stretching vibration and υ(C–C) aliphatic respectively, Table-2a. The band at (1209) cm-1
which account for υ(C-N) cm-1
stretching vibration. The observed bands at [1618 and 1402
]cm−1
were due to υasym{COO−}carboxyl] and υsym{COO−}carboxyl groups,Δυ{COO-}asym-
υ{COO-}sym =216 cm-1
.The strong broad bands around (3481 , and 3421 ) cm-1
were
ascribed to the stretching vibration of υ (O-H) .The band at (3223) cm-1
was appointed to
the stretching vibration of υ (N-H2) [17,18].
Ligand (HL) spectrum : A very strong broad band around (3473) cm-1
ascribed to
stretching vibration of (O-H) group, Table-2a and Figure-3. The spectrum shows a new
band at(1620)cm-1
ascribed to υ(C=N) str. vibrations of the (HL) with disappearance of the
stretching vibration bands for the amine (NH2) group [17]. The bands at (1446)cm-1
,
(3039)cm-1
, (2966)cm-1
and (1273)cm-1
were appointed to υ(C=C) aromatic, υ(C–H)
aromatic, υ(C–H) aliphatic and υ(C–C) aliphatic str. vibration, respectively. The observed
bands at carboxyl groups] in (HL) respectively [19,20]. A sharp band at (1620) cm−1
was
due to stretching vibration of the υ(HC=N-), it was shifted to lower frequency for every
complex and its range appeared in (1604–1616) cm-1
, indicating coordination of the
azomethine N atom (HC=N:→ M ) with the metal ion [ 21] .
Anthranilic acid spectrum : the region of all amino acids ( NH3+
) appears at (3030-
3130) cm-1
[22], and, the band of AnthH appears at (3101) cm-1
, but this band was
disappeared in every complex with appearance of coordinated bands NH2 within the range
(3062-3371)cm-1
, Table-2b. the bands at (1662 & 1485) cm-1
respectively due to υ (COO-
)asym and υ (COO-
)sym , therefore Δυ = 177 cm-1
, in complexes were shifted to a lower
frequency in range (1554-1593)cm-1
for υ (COO-
)asym and (1327-1400) cm-1
for υ (COO-
)sym, Table-2c . The Δυ = [υ (COO-)asym - υ (COO-)sym] appeared within the range (189-
227) cm-1
indicating that the carboxlate ion coordinates as a mono dentate donor with the
metal ions [23]. IR spectra explain that the anthranilato ligand (Anth-
) is negatively
charged can be coordinated to the metal atom [M(II) & M(III)] through the nitrogen atom
in amin group (H2N→M), and oxygen carboxylate group (-COO _
M), serve as a bidentate .
FT-IR spectral results provide strong evidences for the complexation of Schiff base (HL)
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with metal ions in bi dentate mode fashion (NO) occured through the [ (O) of carboxylato
(-COO-) and (N) of the (HC=N-)] groups. New weak intensity bands were observed in the
regions (532-586) cm-1
might be due to M-N and (412-486)cm-1
due to M-O vibrations,
[24,25]. The experimental data suggest that the anthranilic acid acts as bidentate uni
negative charge and adopt an octahedral geometry as proposed .
5. Electronic spectra and magnetic moment for the ligands and complexes:
The UV-Vis spectrum of the ligand (HL) , Figure-4,Table-3 shows two peaks at λmax
(301 and 344)nm due to (π→ π*) & (n→ π*) transition respectively[26] . The UV-
spectrum of (AnthH) showed two high intensity peaks at (242 and 332)nm appointed to
(π→ π*) & (n → π*) respectively [22,24].
Cr(III) complex: The (UV- Vis) spectrum, shows high broad peak at 342 nm was
indicated to the charge transfer and overlap with υ3 (4
A2g→4
T1g(P), while the weak broad
peak at 798 nm , which indicated to (4
A2g→4
T2g(F) (d–d), transition in an octahedral
geometry , and Magnetic moment value is 3.94 B. M. indicating three unpaired electrons
close to spin only value, that agreement of the structure of Cr (III) to be an octahedral
geometry Table-3, [26].
[Fe (L)(Anth)2] complex : The electronic spectrum, shows absorption peak in the UV
region at 344nm which is ascribed to (CT) transitions while another absorption peak in the
visible region at 790nm which belongs to electronic transition 6
A1g→ 4
T1g(4P) , Table-3
[26], and μ eff = 5.09 B.M. is lower than the μ eff of the high spin octahedral complex ,
which is in agreement with an octahedral geometry [27].
[Co(L)(Anth)2] complex : The (UV- Vis) spectrum, shows more than one peak. The first
high intense peak at 344nm which is ascribed to (C.T) transitions. The second peak is at
430 nm which is ascribed to 4
T1g→4
T1g(P) υ3 , and the third absorption peaks are of (d-d)
transitions as shown in Table-3, at (734 nm) and 790 nm, which are considered as
4
T1g→T2g(F) υ1 transitions[28] , and μ eff = 4.36 which suggest an octahedral geometry
[24 ].
[Ni (L)(Anth)2] complex: The electronic spectrum shows two peaks at (344nm) , which
may be appointed to (CT) transitions & (υ3) 3
A2g(F)→ 3
T1g(P) . The peak at 797 nm, which
is due to 3
A2g(F)→ 3
T1g(F) (υ2) {d-d transitions}, respectively[28] , and The μ eff = 2.83
B.M. which suggest an octahedral geometry [24] .
[Cu (L)(Anth)2] complex: This complex , shows a high intense peak at 344 nm is ascribed
to a strong charge transfer and peak at 696nm due to 2
Eg →2
T2g .These peaks are
characteristic in position and width with those reported for octahedral Copper (II)
complexes, [28], and μeff = 1.62 B.M. which agrees by several research worker's data[24 ].
[Cd (L)(Anth)2]complex: The diamagnetic properties showed as expected from their
electronic configuration of Cd(II) d10
complex which did not display any peak in the visible
region. The electronic spectrum of cadimum(II) complex shows the absorption peak at
342nm Table-3 which ascribed to the charge transfer, and which agrees with those
complexes that have an octahedral structure [23], and the diamagnetic properties did not
show any d-d transition,[24] .
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6. Bacterial activities:
Schiff base ligand , Anthranilic acid and the new complexes were tested against
various bacterial were given in chart-1.
The [Cr(L)(Anth)2] shows negative against E-coli and Bacillus. The [Fe(L)(Anth)2] shows
negative result against E-coli and Pseudomonas . Complexes K [Co(L)(Anth2] & K
[Ni(L)(Anth2] show good antibacterial activity against the 3-organisms except E-coli. The
K[Cu(L)(Anth)2] and K[Cd(L)(Anth)2] show very good antibacterial activity against the
four bacteria . Mostly the (ZI)mm of the prepared compounds was in the following order;
Metal complexes > AnthH > HL > DMSO
K[Cd(L)(Anth)2] > K[Cu(L)(Anth)2] > K [Ni(L)(Anth2] >
K [Co(L)(Anth2] >>[Cr(L)(Anth)2] >[Fe(L)(Anth)2]
It is obvious from the top datum that the (ZI) increased significantly on celates special the
partial sharing of the (M+2
& M+3
) positive charge and electronic spectra of d10
of the metal
ion with {N and O} atoms as donor groups or increased because of concept of cell
permeability the lipid membrane that surround the cell surplus the vocal of only lipid
soluble materials pump to which liposolubility is a significant operator that controls
antimicrobial activity [29,30] .
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Table )1a(: The physical properties for The starting materials and ligand HL
Table )1b(: The solubility of the HL in various Solvents
(+) soluble & insoluble (–)
Table )1c(: Physical Properties of the Mixed [L- Metal-Anth] Complexes
Metal%
Λm
Ω-1
cm2
mol-1
M .p°cYield %ColourM. wt
Calc.
Compound
formula
theory (exp)
7.81
(6.83)13.8250 Dec80
Brown
665.48
[Cr(L)(Anth)2]
C33H33CrN4O8
8.34
(8.70)9.519089
Brown
669.48
[Fe(L)(Anth)2]
C33H33FeN4O8
8.28
(8.24)31.422067
Brown
711.67
]2K [Co(L)(Anth)
8O4CoK N33H33C
8.25
(8.79)36.222572
Brown
711.43
K [Ni(L)(Anth)2]
C33H33N4NiO8
8.87
(9.24)
38.1240 Dec78
Brown
716.28
K [Cu(L)(Anth)2]
C33H33CuN4O8
14.69
(13.97)
37.9260 Dec91Brown765.15
K [Cd(L)(A.nth2]
C33H33Cd N4O8
M.wt = {Molecular Weight},m={Molar Conductivity},Dec ={decomposition },M .p=melting point
Table)2a(: FTIR of the M-dop and HL
υ(C-H)
arom.
alph.
-CH3υ (C-N)υ(C=C(
arom.
Alph.
(COO)
υ asy
υ sym
HL
υ(C=N-)υ (N-H2)υ (OH)
aromcompounds
3015
2956,2808
137512091490
1257
1618
1402
--------3223s3481
3421br
M-dop
3039
2966
131512491449
1273
1593
1365
1620--------3473HL
Compounds
Compound
formula
Molecular
weight
M .pºC Colour
Found (Calc.)
C H N O S
M-dop C10H13NO4 211.22 290 White 56.86 6.20 6.63 30.30
----
---
4-DMAB C9H11NO 149.19 72-75 White 72.46 7.43 9.39 10.72
----
---
HL C19H22N2O4
342.39
160-165 Brown
64.95
(66.65)
6.87
(6.48)
8.66
(8.18)
13.32
----
---
Compound
H2O
DMF
DMSO
CH3OH
C2H5OH
C3H6O
C6H6
CCl4
CHCl3
Petroleume
ether
HL - + + + + + - - - -
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Table )2b(: FT-IR of the L-Anthranilic acid
Δ
(-COO-
)asmy-smy
(-COO-
)sym.(-COO-
)asym.
C=O
Str
(carbox.)
(N-H3
+
)
asym,sym)2NH(
Str
1771485s1662s17163101s
3321 s
3240
Table)2c(: FT-IR of the complexes
Table )3(: Electronic spectral of the mixed [L- Metal-Anth] Complexes
Comp. λmax nm
υ' cm-1
Є max
Mol-1
.L.cm-1 Assignments µeff B.M
[Cr(L)(Anth)2] 342
798
29239
12531
2444
13
Charge transfer
4
A2g→4
T1g(P) ν3
3.94
[Fe(L)(Anth)2] 344
790
29069
12658
1797
41
Charge transfer
6
A1g→ 4
T1g(4P) υ3
5.09
K [Co( (Anth2] 344
430
734
790
29069
23255
13623
12658
1691
70
54
Charge transfer
4
T1g→4
T1g(p) υ3
4
T1g→4
T2g(F) υ1
4.36
K [Ni(L)(Anth2] 344
797
29069
12547
1700
16
C.T
3
A2g(F) →3
T1g(p) υ3
2.83
K[Cu(L)(Anth)2] 344
696
29069
14367
1712
55
Charge transfer
2
Eg →2
T2g 1.62
K[Cd(L)(Anth)2] 342 29239 1874 C.T
Diamagnetic
υ (M-O)
for
L3&(Anth)
υ (M-N)
for
L3&(Anth)
Δ υ
(-COO)
asym-
sym
(-COO)
asy,sym
υ C=C
arom
υ(HC=N-)υ (C–H)
+CH3
aliph.
υ (NH)
asy,sym
in Anth
υ (OH)
arom
Comp.
459
414
568
540
2121577
1365s
152316122943
2816
3371
3078
3444[Cr(L)(Anth)2]
462
412
567
532
2081581
1373
152316122981m
2816
3363
3062
3479vs[Fe(L)(Anth)2]
455
416
586
563
2071593
1386
153516122939
2812
3305
3136
3433K [Co( (Anth2]
466
412
567
532
2021593
1381
154316042943
2804
3305
3217
3429
K [Ni(L)(Anth2]
462
424
563
536
2271554
1327
152716042947
2808
3275
3236
3433K[Cu(L)(Anth)2]
451
412
578
555
1891589
1400
1535s16162939
2804
3290
3136
3433K[Cd(L)(Anth)2]
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Figure)1(: 1H-NMR spectrum of the ligand (HL)
Figure)2(: 13C-NMR spectrum of the ligand (HL)
Figure)3(: FT-IR of (HL)
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Figure )4(: Electronic spectrum of the (HL)
Figure )5( : The (ZI) of mixed [ L-Metal -Anth] complexes
0
5
10
15
20
25
30
35
40
45
E-coli
Pseudomonas
Staphylococcus aureus
Bacillus