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Electronic And Structural Properties Of Transition Metal Complexes With Reactive N S O Mixed Donor Ligands
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Book Synopsis Electronic and Structural Properties of Transition Metal Complexes with Reactive N, S, O Mixed Donor Ligands by : Shengfa Ye
Download or read book Electronic and Structural Properties of Transition Metal Complexes with Reactive N, S, O Mixed Donor Ligands written by Shengfa Ye and published by . This book was released on 2005 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure and Properties of Transition Metal Compounds by : Isaac B. Bersuker
Download or read book Electronic Structure and Properties of Transition Metal Compounds written by Isaac B. Bersuker and published by John Wiley & Sons. This book was released on 2010-12-01 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 40% new and revised materials, this second edition offers researchers and students in the field a comprehensive understanding of fundamental molecular properties amidst cutting-edge applications. Including ~70 Example-Boxes and summary notes, questions, exercises, problem sets, and illustrations in each chapter, this publication is also suitable for use as a textbook for advanced undergraduate and graduate students. Novel material is introduced in description of multi-orbital chemical bonding, spectroscopic and magnetic properties, methods of electronic structure calculation, and quantum-classical modeling for organometallic and metallobiochemical systems. This is an excellent reference for chemists, researchers and teachers, and advanced undergraduate and graduate students in inorganic, coordination, and organometallic chemistry.
Author :David Michael P. Mingos Publisher :Springer Science & Business Media ISBN 13 :3642273696 Total Pages :227 pages Book Rating :4.6/5 (422 download)
Book Synopsis Molecular Electronic Structures of Transition Metal Complexes I by : David Michael P. Mingos
Download or read book Molecular Electronic Structures of Transition Metal Complexes I written by David Michael P. Mingos and published by Springer Science & Business Media. This book was released on 2012-01-13 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: J.P. Dahl: Carl Johan Ballhausen (1926–2010).- J.R. Winkler and H.B. Gray: Electronic Structures of Oxo-Metal Ions.- C.D. Flint: Early Days in Kemisk Laboratorium IV and Later Studies.- J.H. Palmer: Transition Metal Corrole Coordination Chemistry. A Review Focusing on Electronic Structural Studies.- W.C. Trogler: Chemical Sensing with Semiconducting Metal Phthalocyanines.- K.M. Lancaster: Biological Outer-Sphere Coordination.- R.K. Hocking and E.I. Solomon: Ligand Field and Molecular Orbital Theories of Transition Metal X-ray Absorption Edge Transitions.- K.B. Møller and N.E. Henriksen: Time-resolved X-ray diffraction: The dynamics of the chemical bond.
Book Synopsis Elucidating the Electronic Structure of Transition Metal Complexes Featuring Redox Active Ligands by : Linus Kai Ho Chiang
Download or read book Elucidating the Electronic Structure of Transition Metal Complexes Featuring Redox Active Ligands written by Linus Kai Ho Chiang and published by . This book was released on 2014 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis a number of projects involving the design and characterization of complexes bearing redox active ligands are described. Focusing on the phenolate containing ligands, the properties and electronic structure of their corresponding metal complexes were studied by a series of experimental (i.e. electrochemistry, UV-Vis-NIR, EPR, rR etc.) and theoretical (DFT) methods. Specifically, the redox processes of these metal complexes were tuned by varying the para-ring substituents. In one study, nickel-salen (salen is a common abbreviation for N2O2 bis-Schiff-base bis-phenolate ligands) complexes were investigated, where the oxidation potentials of the ligand were predictably decreased as the electron donating ability of the para-ring substituents was increased (NMe2 > OMe > tBu > CF3). Interestingly, the oxidation of these geometrically-symmetric complexes afforded an asymmetric electronic structure in a number of cases, in which the ligand radical was localized on one phenolate rather than delocalized across the ligand framework. This difference in electronic structure was found to be dependent on the electron donating ability of the substituents; a delocalized ligand radical was observed for electron-withdrawing substituents and a localized ligand radical for strongly donating substituents. These studies highlight that para-ring substituents can be used to tune the electronic structure (metal vs. ligand based, localized vs. delocalized radical character) of metallosalen complexes. To evaluate if this electronic tuning can be applied to the metal center, a series of cobalt complexes of these salen ligands were prepared. Indeed, the electronic properties of the metal center were also significantly affected by para-ring substitution. These cobalt-salen complexes were tested as catalysts in organometallic radical-mediated polymerizations, where the most electron rich complexes displayed the best conversion rates. With a firm understanding of the role that the para-ring substituent can play in influencing the electronic structure and reactivity of metallosalen complexes in catalysis, two novel iron complexes, which contain a number of redox active phenolate fragments, were prepared. In addition, these iron-complexes feature a chiral bipyrrolidine backbone. Ligands with this chiral diamine backbone bind metals ions diastereoselectively owing to its increased rigidity, which is critical to stereoselectivity in catalysis. A symmetric (with two phenolates) ligand was prepared by reported methods, and a novel route to synthesize an asymmetric ligand (one phenolate and one pyridine) from symmetric starting materials was established. The neutral iron-complexes were found to be high spin (S = 5/2), and can undergo ligand based oxidation to form an antiferromagnetically-coupled (Stotal = 2) species. The results presented will serve as the basis for catalyst development using complexes of similar ligands.
Book Synopsis Metal Complexes with Non-innocent N-donor Ligands by : Marat M. Khusniyarov
Download or read book Metal Complexes with Non-innocent N-donor Ligands written by Marat M. Khusniyarov and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :David Michael P. Mingos Publisher :Springer Science & Business Media ISBN 13 :3642273777 Total Pages :247 pages Book Rating :4.6/5 (422 download)
Book Synopsis Molecular Electronic Structures of Transition Metal Complexes II by : David Michael P. Mingos
Download or read book Molecular Electronic Structures of Transition Metal Complexes II written by David Michael P. Mingos and published by Springer Science & Business Media. This book was released on 2012-01-11 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews current and future trends in modern chemical research, focusing on chemical structure and bonding. Covers development of electronic structure theories for transition metal complexes, orbital models and electronic structure theory and more.
Book Synopsis Electronic Structure and Reactivity of Transition Metal Complexes Incorporating Pro-radical Bis-phenoxide Ligands by : Ryan Michael Clarke
Download or read book Electronic Structure and Reactivity of Transition Metal Complexes Incorporating Pro-radical Bis-phenoxide Ligands written by Ryan Michael Clarke and published by . This book was released on 2018 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal complexes with pro-radical ligands have received considerable research attention due to their interesting electronic structures, photophysical properties, and applications in catalysis. The relative ordering of metal and ligand frontier orbitals in a complex incorporating pro-radical ligands dictates whether oxidation/reduction occurs at the metal centre or at the ligand. Many metalloenzymes couple redox events at multiple metal centres or between metals and pro-radical ligands to facilitate multielectron chemistry. Owing to the simplicity of the active sites, many structural and functional models have been studied. One class of pro-radical ligand that has been investigated extensively are bis-imine bis-phenoxide ligands (i.e. salen) due to their highly modular syntheses. In this thesis, projects related to the synthesis, electronic structure, and reactivity of mono and bimetallic complexes incorporating the salen framework are explored. Chapter 2 presents a systematic investigation of the effects of geometry on the electronic structure of four bis-oxidized bimetallic Ni salen species. The tunability of their intense intervalence charge transfer (IVCT) transitions in the near infrared (NIR) by nearly 400 nm due to exciton coupling in the excited states is described. For the first time, this study demonstrates the applicability of exciton coupling to ligand radical systems absorbing in the NIR region. Chapter 3 investigates the ground-state electronic structure of a bis-oxidized Co dimer. Enhanced metal participation to the singly occupied molecular orbitals results in both high spin Co(III) and Co(II)-L• character in the ground state, and no observable band splitting in the NIR due to exciton coupling. Finally, Chapter 4 describes a series of oxidized nitridomanganese(V) salen complexes with different para ring substituents (R = CF3, tBu, and NMe2), demonstrating that nitride activation is dictated by remote ligand electronics. Upon one-electron oxidation, electron deficient ligands afford a Mn(VI) species and nitride activation, whereas an electron-rich ligand results in ligand based oxidation and resistance to N coupling of the nitrides. This study highlights the alternative reactivity pathways that pro-radical ligands impose on metal complexes and represents a key step in the use of NH3 as a hydrogen storage medium. The results presented herein provide a starting point for further efforts in reactivity with the salen platform.
Book Synopsis Molecular Electronic Structures of Transition Metal Complexes by : David Michael Patrick Mingos
Download or read book Molecular Electronic Structures of Transition Metal Complexes written by David Michael Patrick Mingos and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Structure and Reactivity of Transition Metal Complexes Containing P-, O- and N-donor Ligands by : Vladimir F. Kuznetsov
Download or read book Synthesis, Structure and Reactivity of Transition Metal Complexes Containing P-, O- and N-donor Ligands written by Vladimir F. Kuznetsov and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic and Structural Studies on Some Transition Metal Complexes of N- and N/O-containing Donor Ligands by : Phunrawie Sroisuwan
Download or read book Synthetic and Structural Studies on Some Transition Metal Complexes of N- and N/O-containing Donor Ligands written by Phunrawie Sroisuwan and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic structure and excited state properties of some transition metal complexes having a lowest energy metal to ligand charge transfer state by : Peter C. Servaas
Download or read book Electronic structure and excited state properties of some transition metal complexes having a lowest energy metal to ligand charge transfer state written by Peter C. Servaas and published by . This book was released on 1991 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic and Structural Properties of Selected Transition Metal Compounds Containing the M(H2O)62+ Cation by : Chris Dobe
Download or read book Electronic and Structural Properties of Selected Transition Metal Compounds Containing the M(H2O)62+ Cation written by Chris Dobe and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Ligand Electronics on the Properties and Reactivity of Late Transition Metal Complexes by : David Shaffer
Download or read book The Effects of Ligand Electronics on the Properties and Reactivity of Late Transition Metal Complexes written by David Shaffer and published by . This book was released on 2012 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overarching theme of the work herein is the investigation of the effects of ligand electronics on the electronic structure and reactivity of non-innocent late transition metal complexes. Chapter 2 describes the electronic structure of (nacnacR[supercript]) Rh II[superscript] (phdisq) (nacnacR[superscript] = CH[C(R)(N-i [superscript] Pr2 C6 H3)]2, -[superscript], R = CH3, CF3; phdisq = 9,10-phenanthrenediiminosemiquinone *[superscript]-[superscript]), which incorporates both a reducible diimine ligand and a reducing [beta]-diketiminate ligand. The complex is assigned as having highly delocalized, closed shell frontier orbitals. One-electron oxidation of (nacnacCH3[superscript]) RhII[superscript] (phdisq) produces a delocalized ligand-based radical, while one-electron reduction gives (nacnac CH3[superscript]) RhII[superscript]) (phda). Chapter 3 studies the oxidative addition of halogen substrates to (nacnacR[superscript]) Rh(phdisq). Chlorine and bromine are observed to add in a normal trans fashion, but the addition of iodine is found to be dependent on the electronic properties of the ligands, forming either an [eta]1 -I2 complex or the oxidative addition product. Chapter 4 reports the reactions of (nacnacCH3[superscript])Rh(phdisq) with haloacids. The addition of HCl quickly produces the product [(nacnacH[superscript]CH3[superscript] RhCl2 (phdaH2)]+[superscript] (phdaH2 = 9,10-phenanthrenediamine), which is the result of protonation of the (nacnacCH3[superscript]) ligand, oxidative addition to the rhodium center, and hydrogenation of the phdi ligand. This reaction is reversible, and the deprotonated (nacnacCH3[superscript])RhCl2 (phdaH2) is also isolable but undergoes slow disproportionation. All phdaH2 complexes are dehydrogenated by oxygen to give the corresponding phdi products. Chapter 5 examines the differences between (nacnacCH3[superscript])Co(phdisq) and (nacnacCH3[superscript])Rh(phdisq). The solid state structures are completely analogous, suggesting analogous electronic ground states. Differences in the solution spectroscopic characterization between the rhodium and cobalt complexes suggest the existence of a thermally accessible triplet state for (nacnacCH3[superscript])Co(phdisq). Chapter 6 addresses the question of how the introduction of a reducible ligand will affect the electrocatalytic potential of a catalyst for proton reduction. The complexes (adi)M(bdt) (M = Ni, Co; adi = N-N'-bis(2,4,6-trimethylphenyl)-acenapthene-1,2-diimine, bdt = 1,2-benzenedithiolate2-[superscript] are described, and the cobalt complex is evaluated as an electrocatalyst for H+[superscript] reduction. Results indicate that the [eta]-acidic nature of the adi ligand makes the cobalt center less basic, thus reducing its catalytic efficiency. Chapter 7 compares tungsten complexes of the well-known redox active bis(3,5-di- tert- butyl-phenolate)amido3-[superscript] ligand (ONO3-[superscript]) and the novel bis(4-methyl-thiophenolate)amido3-[superscript] (SNS3-[superscript]) ligand. While W(ONO)2 is found to be an `innocent' tungsten(VI) complex, W(SNS)2 is described as tungsten(IV) with partially oxidized (SNS) ligands. W(SNS)2 has a highly distorted geometry that is ascribed to [eta]-[eta] interactions in the solid state.
Book Synopsis The Electronic Structure and Properties of Some Transition Metal Complexes by : Alan Roger Latham
Download or read book The Electronic Structure and Properties of Some Transition Metal Complexes written by Alan Roger Latham and published by . This book was released on 1966 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure of Transition Metal Complexes by : Catherine M. Redfern
Download or read book Electronic Structure of Transition Metal Complexes written by Catherine M. Redfern and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Correlation of Structure, Reactivity, and Physical Properties with Electronic Structure in Transition Metal Complexes by : Thomas Willets Clayton
Download or read book The Correlation of Structure, Reactivity, and Physical Properties with Electronic Structure in Transition Metal Complexes written by Thomas Willets Clayton and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Features of Transition Metal Complexes Having Ligands with Different Electronic Properties and Mechanistic Aspect of C-H Bond Activation and Functionalization by Transition Metal Complexes by : Wai Han Lam
Download or read book Structural Features of Transition Metal Complexes Having Ligands with Different Electronic Properties and Mechanistic Aspect of C-H Bond Activation and Functionalization by Transition Metal Complexes written by Wai Han Lam and published by . This book was released on 2003 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: