Metal-Ligand Bonding

Author: E A Moore,Rob Janes

Publisher: Royal Society of Chemistry

ISBN: 184755945X

Category: Science

Page: 108

View: 1654

To appreciate the chemistry and physical properties of complexes of the transition series, an understanding of metal-ligand interactions applied to complexes of the d-block is needed. Metal Ligand Bonding aims to provide this through an accessible, detailed, non-mathematical approach. Initial chapters detail the crystal-field model, using it to describe the use of magnetic measurements to distinguish complexes with different electronic configurations and geometries. Subsequent chapters look at the molecular orbital theory of transition metal complexes using a pictorial approach. Bonding in octahedral complexes is explored and electronic spectra and magnetic properties are given extensive coverage. The material addressed in this book forms the foundation of undergraduate lecture courses on d-block chemistry and facilitates learning through various key features, including: full colour diagrams; in-text questions with answers; revision exercises and clearly defined learning outcomes to encourage a reflective approach to study; an associated website; and experimental data and observations from everyday life. A basic knowledge of atomic and molecular orbitals as applied to main group elements is assumed.

Metal-Ligand Interactions

Molecular, Nano-, Micro-, and Macro-systems in Complex Environments

Author: N. Russo,Dennis R. Salahub,Malgorzata Witko

Publisher: Springer Science & Business Media

ISBN: 940100191X

Category: Science

Page: 595

View: 4624

In September 2002, a NATO-ASI was held in Cetraro (CS), Italy on the theme of "Metal-Ligand Interactions in Molecular-, Nano-, Micro-, and Macro-systems in Complex Environments". This event has followed the previous ones held in the same place in 1991, 1994 and 1998. In the present and the previous schools a broad interdisciplinary cross-section of experimental and theoretical researchers, interested in a better understanding of metal-ligand interactions from different viewpoints, was linked together to exchange experience, to review the state-of-the-art, to indicate new techniques and methods, to explore new fields and perspectives. Particular emphasis was given to the problems related with the crossing from molecular systems to nano-, macro-and micro-scale materials and to the effects of the environment on the properties of the molecular systems. The school was organized around lectures and special research seminares given by leading experts in the following fields: • metal clusters • inorganic complexes and materials • surface phenomena • adsorption and catalysis • organic and bio-inorganic systems • ab initio theory • density functional theory • classical and quantum dynamics This volume contains the formal lectures and selected contributed papers and describes the main aspects and problems tackled during the 12 days of the event.

Metal-Ligand Interactions in Organic Chemistry and Biochemistry

Author: A. Pullman,N. Goldblum

Publisher: Springer Science & Business Media

ISBN: 9401763925

Category: Science

Page: 396

View: 2321

The 9th Jerusalem Symposium was dedicated to the memory of Professor Ernst David Bergmann. An imposing and deeply moving memorial session, chaired by Professor Ephraim Katzir, the President of the State of Is rael and a close friend of Professor Bergmann preceded the Symposium itself. During this session, Professor Bergmann's personality, scien tific achievements and contributions to the development of his country were described and praised, besides President Katzir, by Professor A. Dvoretzky, President of the Israel Academy of Sciences and Humanities, Professor D. Ginsburg, Dean of the Israel Institute of Technology in Haifa and the author of these lines. May I just quote short extracts from these speeches. President Katzir: "As we open this ninth in the series of symposia initiated in 1967, it is difficult for me as, I am sure, for many of Ernst Bergmann's friends, co-workers and students, to be here without him. He was not only a great scientist and a beloved teacher, he was one of the most important founders of science in this country. To him we owe many institutes and the establishment here of many branches of science. " Professor Dvoretzky: "Ernst Bergmann's greatness did not stem from one component overshadowing all the others. It was a multifaceted great ness consisting of the harmonious co~lescing of seemingly contrasting entities into a wonderful unity ••.

Metal-ligand interactions

structure and reactivity

Author: North Atlantic Treaty Organization. Scientific Affairs Division

Publisher: Kluwer Academic Pub

ISBN: 9780792338338

Category: Science

Page: 552

View: 1106

Metal-Ligand Interactions - Structure and Reactivity emphasizes the experimental determination of structure and dynamics, supported by the theoretical and computational approaches needed to establish the concepts and guide the experiments. Leading experts present masterly surveys of: clusters, inorganic complexes, surfaces, catalysis, ab initio theory, density functional theory,semiempirical methods, and dynamics. Besides the presentations of the fields of study themselves, the papers also bring out those aspects that impinge on, or could benefit from, progress in other disciplines. Refined in the fire of an interactive and stimulating conference, the papers presented here represent the state of the art of current research.

Organometallic Chemistry and Catalysis

Author: Didier Astruc

Publisher: Springer Science & Business Media

ISBN: 3540461299

Category: Science

Page: 608

View: 3682

This volume covers both basic and advanced aspects of organometallic chemistry of all metals and catalysis. In order to present a comprehensive view of the subject, it provides broad coverage of organometallic chemistry itself. The catalysis section includes the challenging activation and fictionalization of the main classes of hydrocarbons and the industrially crucial heterogeneous catalysis. Summaries and exercises are provides at the end of each chapter, and the answers to these exercises can be found at the back of the book. Beginners in inorganic, organic and organometallic chemistry, as well as advanced scholars and chemists from academia and industry will find much value in this title.

Metal-Ligand Multiple Bonds

The Chemistry of Transition Metal Complexes Containing Oxo, Nitrido, Imido, Alkylidene, Or Alkylidyne Ligands

Author: William A. Nugent,James M. Mayer

Publisher: Wiley-Interscience


Category: Science

Page: 334

View: 4121

The only comprehensive one-volume text/reference on metal-ligand multiple bonds. Stresses the unified nature of the field and includes handy new tabulations of data. The flow within each subtopic is oxygen to nitrogen to carbon. Coverage is up-to-date--virtually every subtopic leads to interesting questions for future research. Presents information otherwise scattered through hundreds of publications.

The Organometallic Chemistry of the Transition Metals

Author: Robert H. Crabtree

Publisher: John Wiley & Sons

ISBN: 0470257628

Category: Science

Page: 520

View: 5793

"One impressive and compressive book. . . . This review would have to be book size to do full justice to all the insights in this volume." —Journal of Metals Online Fully updated and expanded to reflect recent advances, this Fifth Edition of the classic text provides students and professional chemists with a comprehensive introduction to the principles and general properties of organometallic compounds, as well as including practical information on reaction mechanisms and?detailed descriptions of contemporary applications. With increased focus on organic synthesis applications, nanoparticle science, and green chemistry, the Fifth Edition brings this vital resource up to date. New to the Fifth Edition: Chapters have been updated with relevant examples in the field, modern trends, and new applications; the organic applications chapter has been completely rewritten New end-of-chapter problems, along with their solutions Coverage enhanced with developments in nanoparticle science Increased focus on green chemistry An unparalleled pedagogic resource as well as a valuable working reference for professional chemists, with comprehensive coverage and up-to-date information, students and researchers?in organic and organometallic chemistry will turn to The Organometallic Chemistry of the Transition Metals, Fifth Edition for the critical information they need on organometallic compounds, their preparation, and their use in synthesis.

Chelating Agents and Metal Chelates

Author: F Dwyer

Publisher: Elsevier

ISBN: 0323146414

Category: Science

Page: 546

View: 314

Chelating Agents and Metal Chelates focuses on the structure and properties of metal chelates, as well as bond types, stereochemistry, and optical phenomena. The selection first offers information on historical background and fundamental concepts and the nature of metal-ligand bond. Discussions focus on the structure and stability of metal chelates, bond types and characteristic properties, classes of acceptor metal atoms, and metal-metal bonds in complex compounds. The text also touches on bidentate chelates, design and stereochemistry of multidentate chelating agents, and optical phenomena in metal chelates. The publication ponders on oxidation-reduction potentials as functions of donor atom and ligand and metal chelates of ethylenediaminetetraacetic acid and related substances. Topics include liquid junction potentials, reversibility, measurement of redox potentials, ethylenediaminetetraacetato chelate couples, and metal chelates of ethylenediaminetetraacetic acid. The text also takes a look at metal chelates in biological systems and physical and coordination chemistry of tetrapyrrole pigments. The manuscript is a vital reference for senior students, research workers, biologists, and medical scientists interested in the chemistry of metal chelates.

Compounds of the Transition Elements Involving Metal-Metal Bonds

Pergamon Texts in Inorganic Chemistry

Author: D. L. Kepert,K. Vrieze

Publisher: Elsevier

ISBN: 1483151743

Category: Science

Page: 175

View: 2004

Compounds of the Transition Elements Involving Metal-Metal Bonds deals with compounds of the transition elements involving metal-metal bonds, with particular emphasis on metal-metal bonds in coordination compounds and organometallic complexes, halides, and oxides. Factors that influence the formation, stability, and properties of such compounds, as well as their application in various fields of chemistry and physics, are discussed. This book is divided into four sections and begins with a classification of metal-metal bonds and some of the physical and chemical methods used to study them, including X-ray crystallography, magnetic susceptibility and electron spin resonance, nuclear spin resonance, Mössbauer measurements, infrared and Raman spectroscopy, visible and ultraviolet spectroscopy, mass spectrometry, electrical conductivity, electrochemical methods, and chemical reactivity. Factors influencing the strength of metal-metal bonds in metals and compounds are also examined. The remaining sections deal with metal-metal bonds in coordination compounds and organometallic complexes, halides, and oxides. This monograph will be a useful resource for inorganic chemists.

Advances in Metal and Semiconductor Clusters

Metal Ion Solvation and Metal-Ligand Interactions

Author: M.A. Duncan

Publisher: Elsevier

ISBN: 9780080496573

Category: Science

Page: 412

View: 4269

In previous volumes in this series, Advances in Metal and Semiconductor Clusters, the focus has been on atomic clusters of metals, semiconductors and carbon. Fundamental gas phase studies have been surveyed, and most recently scientists have explored new materials which can be produced from clusters or cluster precursors. In this latest volume, the focus shifts to clusters composed primarily of non-metal molecules or atoms which have one or more metal atoms seeded into the cluster as an impurity. These clusters provide model systems for metal ion solvation processes and metal-ligand interactions. Metal-ligand bonding underlies the vast fields of organometallic chemistry, transition metal chemistry and homogeneous catalysis. Catalytic activity, ligand displacement reactions and photochemical activity depend on the specific details of metal-ligand bonding. Likewise, metal ions are ubiquitous in chemistry and biology and weaker electrostatic interactions play a leading role in their function. In solution, metals exist in different charge states depending on the conditions, and the solvation environment strongly influences their chemistry. Many enzymes have metal ions at their active sites, and electrostatic interactions influence the selectivity for metal ion transport through cell membranes. Metal ions (e.g., Mg+, Ca+) are deposited into the earth's atmosphere by meteor ablation, resulting in a rich variety of atmospheric chemistry. Similarly, metal ions ( Mg+) have been observed in planetary atmospheres and in the impact of the comet Shoemaker-Levy 9 on Jupiter. In various circumstances, the electrostatic interactions of metal ions determine the outcome of significant chemistry. Cluster chemistry has made significant contributions to the understanding of these stronger metal ligand interactions and weaker metal ion solvation interactions. In this volume, the authors explore a variety of work in these general areas, where new cluster science techniques in the gas phase have made it possible to synthesize new kinds of complexes with metals and to measure their properties in detail.

Electronic Absorption Spectroscopy and Related Techniques

Author: D. N. Sathyanarayana

Publisher: Universities Press

ISBN: 9788173713712

Category: Absorption spectra

Page: 532

View: 3178

This book provides a conceptual and experimental basis for the interpretation of electronic absorption spectroscopy and related techniques. The basic theories, instrumentation and interpretation of the spectra of organic and coordination compounds for structural studies are presented step-by-step, in an easily understandable style. related topics of emission spectroscopes are covered as well.

Mössbauer Spectroscopy Applied to Inorganic Chemistry

Author: G.J Long

Publisher: Springer Science & Business Media

ISBN: 9780306416477

Category: Science

Page: 668

View: 1759

When presented with a new compound or material, the inorganic chemist will usually have several questions in mind about its composition and structure. Although a simple elemental analysis may answer many questions about its composition, the chemist will still have questions about its structure, and, ifthe material contains a metal atom, he will often want to know its oxidation state, coordination number and geometry. Further, at an increasingly frequent rate, the chemist may need details of the spin state, magnetic and perhaps dynamic properties of the material. If the investigator is fortunate, the material or compound may contain an ele ment such as iron, tin, antimony, iodine, gold, or one of several of the rare earth metals which are amenable to study by the Mossbauer effect. Often the Mossbauer effect can, sometimes with quite simple experiments, provide the answers to all of these questions. The goal of this book is to illustrate the effectiveness of the Mossbauer effect in providing the answers to the many questions that arise in char acterizing new materials and, indeed, in studying known materials in more detail. Several chapters introduce the effect to the novice and provide details about the various hyperfine interactions that are the "bread and butter" of the Mossbauer spectroscopist. Three chapters deal specifically with the experimental aspects of the technique and the increasing impor tance of sophisticated computer analysis of the resulting data.

Symmetry And Spectroscopy Of Molecules

Author: K Veera Reddy

Publisher: New Age International

ISBN: 9788122411423


Page: 700

View: 2281

The Book Covers The Essential Basics Of The Group Theory That Are Required For All Sections Of Chemistry And Emphasizes The Necessity Of This Theory To Understand The Theoretical And Applied Aspects Of Molecular Spectroscopy. The Material In This Book Is Presented For A First And Final Year Postgraduate Level Students Of Indian Universities And The Subject Matter Covered In This Book Forms An Essential Part Of One Or Two Papers. This Text Is The Result Of A Long Felt Need For Developing Certain Novel Techniques For The Teaching Of This Course. No More Nightmares Of Group Theory And Spectroscopy! - Is The Ultimate Purpose Of This Book. A Window-Vision Has Been Provided In The Book While Presenting Most Of The Chapters And At Times A Pedagogical Approach Has Been Employed.Chapter 1 Is Presented As A Survey Into The World Of Symmetry Embodied In Nature And Man-Made Environment. Chapters 2 And 3 Journey Through The Basic Concepts Of Symmetry. A Chronology Of Concept-Learning Is Introduced In These Otherwise Highly Descriptive And Heavily Illustrative Chapters. A Number Of Exercises On Molecular Point Groups Is Presented In Chapter 3 With A Range Of Examples Drafted From Both Organic And Inorganic Molecules. The Structure And Symmetry Of Fullerene Molecules Are Presented In Some Detail For The First Time As A Class Room Example. The Background Provided For Non-Mathematical Chemistry Students In Chapters 4 And 5 Is Very Useful For The Advanced Aspects Of Group Theory. An Elaborate Treatment Given On Character Tables In Chapter 6 Serves As Thegate-Way For Many Applied Aspects Of Group Theory. Chapter 7 Contains Exclusive Details Onnormal Mode Analysis.The Information Presented In These Seven Chapters Will Be Vital To The Learning And Application Of All The Branches Of Spectroscopy. Chapter 8 Presents A Combined Treatment On Infrared And Raman Spectroscopies With Emphasis On Selection Rules And Application Of These Techniques To The Determination Of Molecular Structure Through The Use Of Group Theory. Group Theoretical Treatment Has Been Given While Discussing The Structure And Bonding Of Metal Complexes Presented In Chapters 9 And 11. The Formalisms Of Atomic Spectroscopy Are Presented In Chapter 10. Chapter 12 Deals With The Electronic Spectroscopy Of Metal Complexes That Enjoys The Fruits Of Group Theoretical Formulations.

Energetics of Organic Free Radicals

Author: José A. Martinho Simões,Joel F. Liebman,A. Greenberg

Publisher: Springer Science & Business Media

ISBN: 9780751403787

Category: Science

Page: 320

View: 6484

The current volume consists of eight chapters which interweave various aspects of the structure, energetics and reactivity of organic free radicals, all combining pedagogical insights with current research. The first is by Walling in which a personalized overview is given by one of the modern pioneers of the discipline. In the next two chapters, Tsang, and Traeger and Kompe, present key thermochemical and kinetic quantities from the complementary vantage points of the studies of neutral and cationic species. The fourth chapter by Francisco and Montgomery discusses the armamentarium of modern theory as applied to species with unpaired electrons, while the next chapter by Goodman presents the theory, methodology and results from photoacoustic calorimetry, a novel and powerful experimental technique. Martinho Simoes and Minas da Piedade interrelate organometallic and free radical chemistry, while Greenberg and Liebman consider resonance energy and rearrangements as applied to small molecules and enzyme cofactors alike. The volume ends with the chapter by Tanko and Suleman, which describes the surprising and diverse solvent effects which modulate free radical chem­ istry. This volume will make it apparent to entry-level graduate students and senior researchers alike that much is known and much remains to be done in both the qualitative understanding and quantitative insights of the chemistry of organic free radicals. Jose Artur Martinho Simoes Arthur Greenberg Joel F. Liebman vii Editorial Advisory Board WESTON T. BORDEN ALAN P.

Fundamentals of Inorganic Chemistry

An Introductory Text for Degree Studies

Author: J Barrett,M A Malati

Publisher: Elsevier

ISBN: 1782420533

Category: Science

Page: 320

View: 7628

This work is a foundation course text for first and second year undergraduates in which description and understanding of inorganic chemistry are fully integrated. It covers the main underlying theoretical ideas, taking account of the level of mathematical ability among present-day students commencing university study. Each chapter provides "worked example" problems, supported by additional problem-exercises which test comprehension and serve for revision or self-study. Provides a foundation course text on the fundamentals of inorganic chemistry for first and second year undergraduates Integrates description and understanding of inorganic chemistry Each chapter includes “worked example problems

Symmetry and Topology in Chemical Reactivity

Author: Pieter E. Schipper

Publisher: World Scientific

ISBN: 9789810215422

Category: Science

Page: 272

View: 9523

This well-illustrated book develops, using only the ideas of basic quantum chemistry (e.g. perturbation and symmetry theory), a fundamental conceptual and theoretical framework for chemical reactivity. By feeding the role of symmetry and chemical group topology directly into the development, the analysis generates and explains the successful features of simpler reactivity theories (e.g. frontier orbital theory, the isolobal concept, PMO theory, the Woodward-Hoffmann rules), as well as defines their limitations. The unifying construct is that of a group-resolved correlation diagram, which is shown to represent the formal quantization of the electron arrow, replacing the concept of classical point electrons moving between groups with the concept of quantum electron matter waves which evolve with the evolving nuclear and chemical group structure. The use of the concept of chemical groups (functional group system, substituents, solvents) is central to the development, localising the evolutionary electrons within the functional groups and leading to an isolation and analytic definition of substituent and solvent (catalytic) effects as explicit functions of the reaction coordinate. Each archetypical reaction family is represented by fully-worked examples: viz. aliphatic nucleophilic substitution, aromatic electrophilic substitution, inorganic rearrangements, electrocyclic additions, Diels-Alder additions and addition stages in chiral reactions.

Quantum Chemistry: The Challenge of Transition Metals and Coordination Chemistry

Author: A. Veillard

Publisher: Springer Science & Business Media

ISBN: 9789027722379

Category: Science

Page: 530

View: 386

Over the last twenty years, developments of the ab initio metho dologies and of the computing capacities have progressively turned quantum chemistry into a predictive tool for molecular systems involving only light elements. The situation appears less advanced for systems containing transition metal elements where specific difficulties arise, like those 1inked to the quasi-degeneracy of the lowest atomic states. Correlation effects, which are important only for quantitative accuracy in the treatment of molecules made of light elements, need sometimes to be considered even for a qualitative des cription of transition metals systems (like the multiple metal-metal bond). The treatment of atoms of a high atomic number has necessited the development of model potential methods. These difficulties ex acerbate for systems containing several trans ition atoms a correct description of the dichromium molecule Crz still represents a challenge to quantum chemists. Yet many advances have been made recently in the theoretical treatment of these systems, despite the fact that our understanding still remains disparate with a variety of models and methodologies used more or less successfully (one-electron models, explicitly correlated ab initio methods, density functional formalisms). For these reasons, a NATO Advanced Research Workshop was organized to review in detail the state-of-the-art techniques and at the same time the most common applications. These encompass many fields including the spectroscopy of diatomics and small aggregates, structure and reactivity problems in organometallic chemistry, the cluster surface analogy with its implications for heterogeneous catalysis and the description of extended structures.