The document summarizes research on synthesizing new inorganic complexes by reacting iron carbonyl dianions with an indium tris(3,5-dimethyl)-1-pyrazolylborate moiety. Specifically, reacting [HB(3,5-Me2-pz)3]InCl2·THF with [Fe(C2H4(NH2)2)3][Fe2(CO)8] or [Fe(C2H4(NH2)2)3][Fe3(CO)11] yielded new complexes as shown by IR and NMR spectroscopy, which indicate new indium-iron bonds and coordination of the pyrazolylborate ligand to the
Synthesis, Physicochemical Characterization and Structure Determination of So...IOSR Journals
Some novel nickel(II) complexes with the ligand (z)-4-((2-hydroxy-3-
methoxyphenyl)diazenyl)-1,5-dimethyl-2-phenyl-1H-pyrazol-3-(2H)-one,GAAP,guiacolazoantipyrine, L
having molecular formulae [Ni(L)2X2] and [Ni(L)2(NCS)Cl] where X = Cl-, Br-, NO3
- were synthesized and
characterized. The elemental analysis, Spectral (IR, UV-Visible, EPR, FAB – mass) studies and thermo
gravimetric analysis reveals that the Ni(II) is six coordinated in its complexes. A rhombic symmetry can be
tentatively proposed for the complexes. The magnetic susceptibility measurements show that the complexes are
paramagnetic in nature. The powder XRD study shows its anisotropic nature
Computational Study on the Effect of Axial Ligation Upon the Electronic Struc...Roxana Kincses
Computational Study on the Effect of Axial Ligation Upon the
Electronic Structure of Copper (II) Porphyrinate
(CuTPPs = [5,10,15,20-tetrakis(N-methylpyridyl-4)porhinato]copper(II)tetratosylate))
- Electronic Structure with Different Axial Ligands
Synthesis, Physicochemical Characterization and Structure Determination of So...IOSR Journals
Some novel nickel(II) complexes with the ligand (z)-4-((2-hydroxy-3-
methoxyphenyl)diazenyl)-1,5-dimethyl-2-phenyl-1H-pyrazol-3-(2H)-one,GAAP,guiacolazoantipyrine, L
having molecular formulae [Ni(L)2X2] and [Ni(L)2(NCS)Cl] where X = Cl-, Br-, NO3
- were synthesized and
characterized. The elemental analysis, Spectral (IR, UV-Visible, EPR, FAB – mass) studies and thermo
gravimetric analysis reveals that the Ni(II) is six coordinated in its complexes. A rhombic symmetry can be
tentatively proposed for the complexes. The magnetic susceptibility measurements show that the complexes are
paramagnetic in nature. The powder XRD study shows its anisotropic nature
Computational Study on the Effect of Axial Ligation Upon the Electronic Struc...Roxana Kincses
Computational Study on the Effect of Axial Ligation Upon the
Electronic Structure of Copper (II) Porphyrinate
(CuTPPs = [5,10,15,20-tetrakis(N-methylpyridyl-4)porhinato]copper(II)tetratosylate))
- Electronic Structure with Different Axial Ligands
what is metal allyl complex
what is the definition of metal allyl complex
what are synthesis of metal allyl complex
what are reaction of metal allyl complex
summary of metal allyl complex
Studies On The Cobalt(II) And Copper(II) Complexes Of 2,5-Substituted 1,3,4-T...IOSR Journals
New metal complexes of Co(II),and Cu(II) have been synthesized by reacting metal solutions with the ligand 2,5-substituted 1,3,4-triazoles in alcoholic medium. Molecular formulae of the complexes were determined and are further characterized by IR spectroscopy, magnetic susceptibility and molar conductance studies. The ligand acts as a bidentate ligand co-ordinating through the nitrogen atoms present in the ring.
A detailed study of Transition Metal Complexes of a Schiff base with its Phys...Abhishek Ghara
The many activities of metal ions in biology have stimulated the development of metal based therapeutics. It has been found that biologically active compounds become more effective and bacteriostatic upon chelation with metal ions also the biological activity of many drugs has been shown to be enhanced on complexing with metal ions, hence promoting their use in Pharmacology. The present work deals with the synthesis of metal complexes derived from a novel Schiff base drug synthesized from urea and salicylaldehyde and its physico-chemical analysis to find out ligand- metal ratio of this complex in solution. For the structure elucidation of these complexes “Monovariation method (Mole ratio method/ Yoe-Jones Method)” has been used to ascertain the ligand-metal ratio in the complex. The stability constant of the formed complex was calculated by molar conductance measurement using Modified Job’s method (Method of Continuous Variations). The analysis has been carried out using conductometry. To confirm metal-ligand ratio, conductometric titrations were carried out at room temperature using analytical grade metal salts. Titrations were carried out with “systronics conductivity-meter” using dip type conductivity cell having cell constant 1 at room temperature.
Crystal Structure, Topological and Hirshfeld Surface Analysis of a Zn(II) Zwi...Awad Albalwi
Abstract: A mononuclear Zn(II) complex of (Zn(H2L) (CH3OH) Cl2
) (1) has been synthesized by using
a nonlinear optically active Zwitterionic Schiff base which is 4-((2-hydroxy-3-methoxybenzylidene)
amino) benzoic acid (H2L). Complex 1 has been structurally analyzed by FTIR and UV spectroscopy,
TGA, Powder-XRD and single crystal X-ray diffraction. X-Ray crystallographic studies revealed Zn(II)
complex crystallizes in a P21/c space group and exists in a distorted trigonal bipyramidal geometry
(τ = 0.68).
Synthesis and characterization of mixed ligand complexes of some metals with ...Taghreed Al-Noor
This paper presents the synthesis and study of some new mixed-liagnd complexes containing nicotinamide(C6H7N2O) symbolized (NA) and phenylalanine (C9H11NO2)symbolized (pheH)] with some metal ions.
The resulting products were found to be solid crystalline complexes which have been characterized by :Melting points, Solubility, Molar conductivity.
determination the percentage of the metal in the complexes by flame(AAS), magnetic susceptipibility, Spectroscopic Method [FT-IR and UV-Vis].
The proposed structure of the complexes using program , chem office 3D(2006) .
The general formula have been given for the prepared complexes :[M(NA)2(phe)]cl
M(II): Mn(II) ,Co(II) , Ni(II) , Cu(II) , Zn(II) , Cd(II) & Hg(II) .
NA = Nicotinamide= C6H7N2O
Phe - = phenylalanine ion = C9H10NO2
CHE3063 Organometallic Chemistry, Molecular Symmetry and InorgJinElias52
CHE3063 Organometallic Chemistry, Molecular Symmetry and Inorganic Electronics
Coursework Questions 2021-22
Deadline: 7th December 2021 submit to SurreyLearn assignments folder
Note that some of these questions are formative (F), meaning that you may complete them and ask
for quick feedback from Dr Turner or Dr Riddlestone. The summative (S) questions will be used to
determine your mark for this coursework.
The following abbreviations are used
Cy = cyclohexyl, Et = ethyl, Ph = phenyl, Me = methyl, bipy = 2,2'-bipyridine, Cp = cyclopentadienyl
Formative Questions
F1. Determine the metal valence electron count for each of the following compounds.
(i) [(5-Cp)Rh(2-C2H4)(PMe3)]
(ii) [TiCl2(5- Cp)]
(iii) [(3-C3H5)2Rh(2-Cl)2Rh(3-C3H5)2]
(iv) [Rh(Cl)(H)2(2-C2H4)(PPh3)2]
(v) [Ir(H2)2(H)2(PCy3)]+
(vi) [(5- Cp)Co(Me)(PMe3)2]+
[Formative, Dr Turner]
F2. Using symmetry arguments, show if and how vibrational spectroscopy can be used to
distinguish between pure geometric isomers of [Cr(PMe3)4(CO)2]. Would you be able to
recognise a mixture of isomers from vibrational spectroscopy?
[Formative, Dr Turner]
F3. The hydroformylation of 1-butene can be catalysed by [RhH(CO)(PPh3)3] and results in the
formation of major and minor products. Draw the structures of both products and construct
a catalytic cycle for the formation of the major product. Why are both linear and branched
products both formed in this reaction?
[Formative, Dr Riddlestone]
Summative Questions
S1. At 30°C the 1H-NMR spectrum of [Fe(CO)2(Cp)2] shows two peaks, one of which is at 5.6
ppm. At -55°C the spectrum shows 3 peaks at 4, 5.6 and 6.5 ppm with relative intensity
4:5:1, respectively. Further cooling results in the broad peak at 4 ppm splitting into two
equally intense multiplets. Fully explain this data and sketch the structure of the compound.
[6]
S2. Explain all the factors that could affect the carbonyl stretching frequency in the generalized
compound [MwLx(CO)y]z. M is a metal atom or ion; L represents non-carbonyl ligands; y is at
least 1, w and x are positive integers, z is a positive or negative integer.
[8]
S3. The following table lists the vibrational bands for an isomer of N2F2.
Band position (cm-1)
infra-red spectrum
Band position (cm-1)
Raman spectrum
360 592
421 1010
989 1636
(i) Show how a simple calculation can determine the total number of vibrational bands.
Fully explain the origin of the method that you use.
[3]
(ii) Which isomer of N2F2 is characterized by the data above? Explain a method to
determine your answer without having to do any calculations.
[3]
(iii) For the isomer, chosen in part (ii), determine the irreducible representations for the
normal vibrational modes. Determine which of the irreducible representations are
observable in Raman and IR spectroscopies. Explain your reasoning.
[9]
(iv) One of the vibrations, listed in the table, is the s ...
what is metal allyl complex
what is the definition of metal allyl complex
what are synthesis of metal allyl complex
what are reaction of metal allyl complex
summary of metal allyl complex
Studies On The Cobalt(II) And Copper(II) Complexes Of 2,5-Substituted 1,3,4-T...IOSR Journals
New metal complexes of Co(II),and Cu(II) have been synthesized by reacting metal solutions with the ligand 2,5-substituted 1,3,4-triazoles in alcoholic medium. Molecular formulae of the complexes were determined and are further characterized by IR spectroscopy, magnetic susceptibility and molar conductance studies. The ligand acts as a bidentate ligand co-ordinating through the nitrogen atoms present in the ring.
A detailed study of Transition Metal Complexes of a Schiff base with its Phys...Abhishek Ghara
The many activities of metal ions in biology have stimulated the development of metal based therapeutics. It has been found that biologically active compounds become more effective and bacteriostatic upon chelation with metal ions also the biological activity of many drugs has been shown to be enhanced on complexing with metal ions, hence promoting their use in Pharmacology. The present work deals with the synthesis of metal complexes derived from a novel Schiff base drug synthesized from urea and salicylaldehyde and its physico-chemical analysis to find out ligand- metal ratio of this complex in solution. For the structure elucidation of these complexes “Monovariation method (Mole ratio method/ Yoe-Jones Method)” has been used to ascertain the ligand-metal ratio in the complex. The stability constant of the formed complex was calculated by molar conductance measurement using Modified Job’s method (Method of Continuous Variations). The analysis has been carried out using conductometry. To confirm metal-ligand ratio, conductometric titrations were carried out at room temperature using analytical grade metal salts. Titrations were carried out with “systronics conductivity-meter” using dip type conductivity cell having cell constant 1 at room temperature.
Crystal Structure, Topological and Hirshfeld Surface Analysis of a Zn(II) Zwi...Awad Albalwi
Abstract: A mononuclear Zn(II) complex of (Zn(H2L) (CH3OH) Cl2
) (1) has been synthesized by using
a nonlinear optically active Zwitterionic Schiff base which is 4-((2-hydroxy-3-methoxybenzylidene)
amino) benzoic acid (H2L). Complex 1 has been structurally analyzed by FTIR and UV spectroscopy,
TGA, Powder-XRD and single crystal X-ray diffraction. X-Ray crystallographic studies revealed Zn(II)
complex crystallizes in a P21/c space group and exists in a distorted trigonal bipyramidal geometry
(τ = 0.68).
Synthesis and characterization of mixed ligand complexes of some metals with ...Taghreed Al-Noor
This paper presents the synthesis and study of some new mixed-liagnd complexes containing nicotinamide(C6H7N2O) symbolized (NA) and phenylalanine (C9H11NO2)symbolized (pheH)] with some metal ions.
The resulting products were found to be solid crystalline complexes which have been characterized by :Melting points, Solubility, Molar conductivity.
determination the percentage of the metal in the complexes by flame(AAS), magnetic susceptipibility, Spectroscopic Method [FT-IR and UV-Vis].
The proposed structure of the complexes using program , chem office 3D(2006) .
The general formula have been given for the prepared complexes :[M(NA)2(phe)]cl
M(II): Mn(II) ,Co(II) , Ni(II) , Cu(II) , Zn(II) , Cd(II) & Hg(II) .
NA = Nicotinamide= C6H7N2O
Phe - = phenylalanine ion = C9H10NO2
CHE3063 Organometallic Chemistry, Molecular Symmetry and InorgJinElias52
CHE3063 Organometallic Chemistry, Molecular Symmetry and Inorganic Electronics
Coursework Questions 2021-22
Deadline: 7th December 2021 submit to SurreyLearn assignments folder
Note that some of these questions are formative (F), meaning that you may complete them and ask
for quick feedback from Dr Turner or Dr Riddlestone. The summative (S) questions will be used to
determine your mark for this coursework.
The following abbreviations are used
Cy = cyclohexyl, Et = ethyl, Ph = phenyl, Me = methyl, bipy = 2,2'-bipyridine, Cp = cyclopentadienyl
Formative Questions
F1. Determine the metal valence electron count for each of the following compounds.
(i) [(5-Cp)Rh(2-C2H4)(PMe3)]
(ii) [TiCl2(5- Cp)]
(iii) [(3-C3H5)2Rh(2-Cl)2Rh(3-C3H5)2]
(iv) [Rh(Cl)(H)2(2-C2H4)(PPh3)2]
(v) [Ir(H2)2(H)2(PCy3)]+
(vi) [(5- Cp)Co(Me)(PMe3)2]+
[Formative, Dr Turner]
F2. Using symmetry arguments, show if and how vibrational spectroscopy can be used to
distinguish between pure geometric isomers of [Cr(PMe3)4(CO)2]. Would you be able to
recognise a mixture of isomers from vibrational spectroscopy?
[Formative, Dr Turner]
F3. The hydroformylation of 1-butene can be catalysed by [RhH(CO)(PPh3)3] and results in the
formation of major and minor products. Draw the structures of both products and construct
a catalytic cycle for the formation of the major product. Why are both linear and branched
products both formed in this reaction?
[Formative, Dr Riddlestone]
Summative Questions
S1. At 30°C the 1H-NMR spectrum of [Fe(CO)2(Cp)2] shows two peaks, one of which is at 5.6
ppm. At -55°C the spectrum shows 3 peaks at 4, 5.6 and 6.5 ppm with relative intensity
4:5:1, respectively. Further cooling results in the broad peak at 4 ppm splitting into two
equally intense multiplets. Fully explain this data and sketch the structure of the compound.
[6]
S2. Explain all the factors that could affect the carbonyl stretching frequency in the generalized
compound [MwLx(CO)y]z. M is a metal atom or ion; L represents non-carbonyl ligands; y is at
least 1, w and x are positive integers, z is a positive or negative integer.
[8]
S3. The following table lists the vibrational bands for an isomer of N2F2.
Band position (cm-1)
infra-red spectrum
Band position (cm-1)
Raman spectrum
360 592
421 1010
989 1636
(i) Show how a simple calculation can determine the total number of vibrational bands.
Fully explain the origin of the method that you use.
[3]
(ii) Which isomer of N2F2 is characterized by the data above? Explain a method to
determine your answer without having to do any calculations.
[3]
(iii) For the isomer, chosen in part (ii), determine the irreducible representations for the
normal vibrational modes. Determine which of the irreducible representations are
observable in Raman and IR spectroscopies. Explain your reasoning.
[9]
(iv) One of the vibrations, listed in the table, is the s ...
Selective Oxidation of Cyclohexene, Toluene and Ethyl Benzene Catalyzed by Bi...Iranian Chemical Society
Bis-(L-tyrosinato)copper(II) was reacted with 3-(chloropropyl)-trimethoxysilane functionalized silica that has infused magnetite to yield a magnetically separable catalyst in which the copper carboxylate is covalently linked to the silica matrix through the silane linkage. The immobilized catalyst has been characterized by spectroscopic studies (such as FT-IR, EPR, Magnetic Measurement, SEM) and chemical analyses. The immobilized catalytic system functions as an efficient heterogeneous catalyst for oxidation of cyclohexene, toluene and ethyl benzene in the presence of hydrogen peroxide (as an oxidant) and sodium bicarbonate (a co-catalyst). The reaction conditions have been optimized for solvent, temperature and amount of oxidant and catalyst. Comparison of the encapsulated catalyst with the corresponding homogeneous catalyst showed that the heterogeneous catalyst had higher activity and selectivity than the homogeneous catalyst. The immobilized catalyst could be readily recovered from the reaction mixture by using a simple magnet, and reused up to five times without any loss of activity.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
![Abstract The reaction of [HB(3,5-Me 2 -pz) 3 ]InCl 2 •THF (pz=pyrazolyl ring) with [Fe(C 2 H 4 (NH 2 ) 2 ) 3 ][Fe 2 (CO) 8 ] in THF yields [HB(3,5-Me 2 -pz) 3 ]In[Fe 2 (CO) 8 ] •THF in 58.58% yield. The reaction of [HB(3,5-Me 2 -pz) 3 ]InCl 2 •THF with [Fe(C 2 H 4 (NH 2 ) 2 ) 3 ][Fe 3 (CO) 11 ] in THF yields [HB(3,5-Me 2 -pz) 3 ]In[Fe 3 (CO) 11 ]. In 46.30% yield. Infrared spectroscopy monitoring the shifts in the carbonyl regions of these new complexes show results that new indium to iron bonds are taking place as these two complexes coordinate with the Indium tris(3,5-dimethyl)-1 Pyrazolylborate Moiety. In monitoring the shifting IR bands of the CO region of the respective spectra, starting from the neutral parent compounds, to the ethylenediamine dianions 1 , and to the final the coordinated complexes with the Indium Pyrazolylborate Moiety, it has been shown that these multi metal centered carbonyl dianions react with the Indium Pyrazolylborate Moiety forming new inorganic complexes. Iron Carbonyl Dianions Stabilized by the Indium tris(3,5-dimethyl)-1 Pyrazolylborate Moiety Introduction In recent years the pyrazolylborate family of ligands have been used to create compounds that exhibit a number of interesting features. The most interesting feature of the pyrazolylborate ligand is its capability to bond or coordinate to a central metal atom, like indium. In the family of pyrazolylborate stems from research and synthesis done by Trofimenko, et. al at DuPont. 1 More notably known as the scorpinate family of ligands, the pyrazolylborate acts like a scorpion, coordinating to a central metal atom with two of the nitrogens from the first two pyrazolyl rings and the final coordination site is achieved by “stinging” the metal center from the last nitrogen on the last pyrazolyl ring. Reger, et. al. have explored this interesting capability in their class of pyrazolylborate ligand system known collectively as the indium pyrazolylborate family. 2,3.4 Focusing on an indium center, Reger et. al. have designed a ligand system containing the tris(3,5 dimethyl)-1 pyrazolylborate moiety and a indium metal center Research is on going in the field of these six coordinate indium pyrazolylborate complexes. Specifically looking at the indium tris(3,5 dimethyl)-1 pyrazolylborate moiety in providing stability to dianionic metal carbonyl species. Previous dianion metal species have been synthesized, including Collman’s Reagent and others, as reported by Ellis, et. al. 5 In narrowing down the list of dianionic metal carbonyls, the group of iron carbonyl dianions can be synthesized in situ and brought together with the one pot synthesis stated by Reger, et. al. (Equation 1) The results of these reactions look promising in stabilizing the group of iron metal carbonyl dianions stemming originally from Reger, et. al. research completed with Collman’s Reagent. 6 The investigation of this research explores coordinating these multi-iron metal carbonyl dianions to the indium tris( 3,5 dimethyl)-1 pyrazolyl borate moiety [Fe(C 2 H 4 (NH2) 2 ) 3 ][Fe 2 (CO) 8 ] + [Fe(C 2 H 4 (NH2) 2 ) 3 ][Fe 3 (CO) 11 ] + Spectral Analysis The shifts in the IR spectra in the CO region is expected to shift from the synthesis of the neutral parent to the dianion as more electron density is given to the central iron atoms. The CO shifts between the dianion and the iron indium pyrazolylborate complex shifted slightly (comparatively to the dianion and neutral parent) as the two lone pairs (one from each iron) is donated to the central indium atom. The reaction of [Fe(C 2 H 4 (NH 2 ) 2 ) 3 ][Fe 2 (CO) 8 ] with HB[(Me 2 -pz) 3 ]InCl 2 ·THF yielded a major product with carbonyl bands 2011.18 cm -1 , 1971.58 cm -1 ,1928.14 cm -1 ,1891.38 cm -1 . The neutral parent Fe 2 (CO) 9 had carbonyl bands at 2081.52 cm -1 , 2017.95 cm -1 , 1985.92 cm -1 ,1826.57cm -1 . The ethylenediamine dianion complex had carbonyl bands at 2009.83 cm -1 , 1924.24 cm -1 , 1852.04 cm -1 . The 1 HNMR of this compound provided an insight as to the structure of this compound. 1 HNMR (CD 3 SOCD 3 ): δ 5.505, 5.137 ( s,s, 2.87, 2.09; 4-H); 3.388, 2.162 (m-m 18.89, 20.39; THF), 2.706, 1.883, (s-s, 45.84, 44.32 Me), 1.507, 0.869, (s-s, Me 15.89, 8.49). The peaks at 5.505 and 5.137 ppm indicate the 4-H position on the Pyrazolyl rings, the peaks at 3.388 and 2.162 provide that a weakly bound THF solvent ligand is attached, keeping the indium octahedral, the peaks at 2.706 and 1.883 show the two equivalent methyl groups on two of the Pyrazolyl rings and the peaks at 1.507 and 0.869 show the nonequivelent methyl groups on the last Pyrazolyl ring. Comparing these 1 HNMR peaks to the ones for the initial Indium tris(3,5-dimethyl)-1 Pyrazolylborate: 1 HNMR (CDCl 3 ): HB[(Me 2 -pz) 3 ]InCl 2 ·THF δ5.97 (1.23, s, 4-Hpz*); 3.80, 1.90 (1.00, 1.90, m, m; THF); 2.60, 2.95 (7.10, 7.10,s,s; 3,5Me-pz*) the peaks have shifted, indicating that the Indium tris(3,5-dimethyl)-1 Pyrazolylborate has coordinated to the diiron complex . The two lone pair of electrons in the reduced state of the ethylenediamine dianion (one from each iron) has donated them to the central indium atom making a new coordination complex. The reaction of [Fe(C 2 H 4 (NH 2 ) 2 ) 3 ][Fe 3 (CO) 11 ] with HB[(Me 2 -pz) 3 ]InCl 2 ·THF yielded a major product [HB(Me 2 -pz) 3 ]In[Fe 3 (CO) 11 ] with carbonyl bands at 2001.44 cm -1 , 1941.10 cm -1 , 1893.64 cm -1 . The [Fe(C 2 H 4 (NH 2 ) 2 ) 3 ][Fe 3 (CO) 11 ] compound was made from the procedure provided by Heiber, et. al. 7,8 and provides a convenient synthesis and the complex is much more stable and easier to handle both in crystal form and in situ The neutral parent Fe 3 (CO) 12 had carbonyl bands at 2000cm -1 (CO) ; 1826.58cm -1 (CO bridged) and the ethylenediamine dianion complex had carbonyl bands at 2009.83 cm -1 , 1924.24 cm -1 , 1852.04 cm -1 . The shifts in the IR spectra in the CO region is expected to shift from the synthesis of the neutral parent to the dianion as more electron density is given to the central iron atoms. The CO shifts between the dianion and the iron indium pyrazolylborate complex shifted slightly (comparatively to the dianion and neutral parent) as the two lone pairs are donated from the irons to the central indium atom. Brandon M. Alexander, Mount Union College ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Acknowledgements Dr. Scott Mason, Mount Union College, Chemistry Department Dr. Jeffery Draves, Mount Union College, Chemistry Department Dr. Mark Himmelien, Mount Union College, Foreign Languages . Figure 1- 3D Model: Energy (MM2) Minimization (view down the Boron) Figure 1- 3D Model: Energy (MM2) Minimization (view from the Iron Side) L=tris ligand, [HB(Me 2 -pz) 3 ] M = Fe , W L I n C l 2 T H F + N a 2 M ( C O ) x LIn-M(CO) x + 2 NaCl Equation 1—One Pot Synthesis](https://image.slidesharecdn.com/scholardaypresentationposter-12759337215115-phpapp01/85/Scholar-Day-Presentation-Poster-1-320.jpg)
