Coordination chemistry-part-1
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This document discusses coordination chemistry and coordination compounds. It defines coordination chemistry as the study of compounds formed between metals and ligands. Coordinate covalent bonds are observed in these complexes. Coordination compounds can exist as either double salts, which fully ionize in polar solvents, or complex compounds, which partially ionize. Ligands are classified as monodentate, bidentate, or polydentate based on the number of donor atoms bonding to the central metal atom. Common examples of various types of ligands are provided.
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- Common indicators used in complexometric titrations include Eriochrome black T, Calmagite
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The document is a chapter about elements and compounds from a chemistry textbook. It contains the following key points in 3 sentences:
The chapter defines elements as substances that cannot be broken down further, while compounds are substances made of two or more elements chemically bonded together. It explains that elements are represented by chemical symbols and compounds by chemical formulas showing the ratios of atoms present. The chapter also discusses writing and balancing chemical equations to represent chemical reactions in terms of reactants and products.
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This document provides information about coordination compounds and coordination chemistry. It defines key terms such as coordination compounds, coordination entities, central atoms/ions, ligands, and discusses the classification of ligands. It also covers topics like oxidation number, coordination number, coordination polyhedra, classification of complexes, and Werner's theory of coordination compounds. IUPAC nomenclature for naming coordination compounds is also presented.
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This document provides an introduction to coordination compounds. It defines coordination compounds as complex compounds formed when a central metal ion bonds with surrounding neutral or charged ligand species via dative bonds. The central concepts discussed include:
- Coordination number which represents the total number of bonds between the metal ion and ligands.
- Coordination sphere which comprises the metal ion and surrounding ligands.
- Ligands which contain lone pair electrons and can be monodentate, polydentate, etc.
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This document discusses coordination compounds and their classification. It defines coordination compounds as complexes containing transition metals bonded to other ions or molecules through coordinate bonds. Coordination compounds can be inorganic salts, double salts, or complex salts. A complex salt contains at least one complex ion with a central metal ion bound to surrounding ligands through coordinate bonds. The document also defines important terms related to coordination compounds such as ligands, coordination number, and coordination polyhedra. It discusses the nomenclature rules for naming mononuclear coordination entities and compounds.
All chapters of engineering chemistry
This document discusses bioinorganic chemistry and the roles of metal ions in biological systems. It begins by noting that the key elements that make up biomolecules are carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur, with phosphorus playing a role in ATP and DNA and sulfur enabling cysteine coordination in proteins. Other essential elements include sodium, potassium, magnesium, and calcium which are involved in osmotic control, nerve action, chlorophyll, and structural functions. Trace metals like iron, cobalt, copper, zinc, and molybdenum are also required in small amounts. The document classifies the essential chemical elements into bulk elements, macrominerals and ions, and trace elements.
group 15 elements ppt presentation on slideshare
When aqueous ammonia (NH4OH) is added to a solution containing Cu2+ ions, it reacts as follows:
Cu2+ ions have vacant orbitals that can accept electron pairs from the lone pair of electrons on the nitrogen atoms of four ammonia molecules. This leads to the formation of a complex ion called tetraamine copper(II) ion [Cu(NH3)4]2+.
The [Cu(NH3)4]2+ ion is deep blue in color due to d-d transitions within the copper ion. So when ammonia solution is added to copper sulfate solution, a deep blue colored solution of [Cu(NH3)4]2+ is obtained.
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Coordination chemistry-part-1
- 1. Co-ordination Chemistry By Dr.S.Manimekalai Assistant Professor of Chemistry E.M.G.Yadava Women’s College Madurai
- 2. Co-ordination Chemistry Introduction It is the study of a class of compounds formed by metals Coordinate covalent bonds are observed in complexes These compounds are basically the compounds of the d-block elements These compounds have major importance in industries, metallurgy and pigment EDTA is a ligand that is used to determine the hardness of the water. EDTA is also used for DNA agarose gel.
- 3. Continue….. The addition compound which is undergoing complete ionisation (called double salt) in polar solvent partial ionisation ( called complex compounds) in polar solvent Ex: double salt: KCl MgCl2 KCl.MgCl2.6H2O H2O H3O+ K+Mg2+Cl- polar solvent complete dissociation Complex compounds: K3[Fe(CN)6] K+ + [Fe(CN)6]- polar solvent partial ionisation
- 4. Continue …… [ M Lx ] y ionisation sphere Central metal atom coordination number ligand co-ordination sphere In complex form central metal atom acts as lewis acid(electron pair acceptor ) Ligand acts as lewis base (electron pair donar) Transfer of C-H σ bonding electrons is called agostic interaction M C H
- 5. Classification of ligands 1. Mono dentate ligands The ligands which only have one atom as the donor atom Examples Neutral molecules H2O – aqua CS - thio carbonyl NS – thio nitrosyl CH3-NH2 – methyl amine CO - Carbonyl NO - nitrosyl NH3 - amine
- 6. (CH3CH2)3N - tri ethyl amine (CH3)2NH – dimethyl amine ph3P - triphenyl phosphene (C2H5)3P – tri ethyl phosphene PF3 - phosphorus tri fluoride ligand C2H5-O-C2H5 – diethyl ether O2 - dioxygen N2 - dinitrogen C5H5N – pyridine
- 7. Anions F- - fluoro Br- -Bromo Cl- - Chloro I- - iodo OH- - hydroxo H- - hydrido SH- - mercapto CN- - cyano NC- - isocyano
- 8. CH3COO- - acetato NH2 - - amido NH2 - - imido N3 - - azido N3 - - nitrido (CH3)2N- - dimethyl amido CH3O- - methoxo C2H5O- - ethoxo O2 - - superoxo O2 2- - peroxo O2- - oxo
- 9. SO4 2- - sulphato ONO- - nitrito NO2 - - nitro SCN- - thio cyanato NCS- - iso thio cyanato S2- - sulphido SO3 2- - sulphito Bidentate ligands ligands which have two atoms as the donor atoms Examples: NH2-CH2-CH2-NH2 - ethylene diamine (en) PH2-CH2-CH2-PH2 - ethylene diphosphene (diphos)
- 10. CH3-CH(NH2)-CH2(NH2) - propylene diamine (Pn) CH3-CH(NH2)-CH(NH2)-CH3 - butylene diamine (Bn) CH3-C(CH3)(NH2)-C(CH3)(NH2)-CH3- tetra methylene diamine (tn) NH2NH2 - hydrazine O=C-O- - oxalato (ox2-) O=C-O- O=C O- - carbonato O- O=N O- - nitrato O-
- 11. Polydentate ligands Some ligands have many donor atoms Example: Tri dentate ligand- 3 donor atoms NH2-CH2-CH-NH2-CH2-NH2 - Propylene triamine(pn) Tetra dentate ligand- 4 donor atoms NH2-(CH2)2-NH-(CH2)2-NH-(CH2)2-NH2- triethylene tetramine penta dentate ligands- 5 donor atoms NH2-(CH2)2-NH-(CH2)2-NH-(CH2)2-NH-(CH2)2-NH2- tetra ethylene pentamine EDTA (ethylene diamine tri acetato)