Metal-Ligand Multiple Bonds


Book Description

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.




Metal–Ligand Bonding


Book Description

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.




Multiple Bonds between Metal Atoms


Book Description

Provides historical perspective as well as current data Abundantly illustrated with figures redrawn from literature data Covers all pertinent theory and physical chemistry Catalytic and chemotherapeutic applications are included










Molecular Metal-Metal Bonds


Book Description

Systematically covering all the latest developments in the field, this is a comprehensive and handy introduction to metal-metal bonding. The chapters follow a uniform, coherent structure for a clear overview, allowing readers easy access to the information. The text covers such topics as synthesis, properties, structures, notable features, reactivity and examples of applications of the most important compounds in each group with metal-metal bonding throughout the periodic table. With its general remarks at the beginning of each chapter, this is a must-have reference for all molecular inorganic chemists, including PhD students and postdocs, as well as more experienced researchers.




Metal-Metal Bonds and Clusters in Chemistry and Catalysis


Book Description

This book contains a series of papers and abstracts from the 7th Industry-University Cooperative Chemistry Program symposium held in the spring of 1989 at Texas A&M University. The symposium was larger than previous IUCCP symposia since it also celebrated the 25 years that had elapsed since the initial discovery by F. A. Cotton and his co-workers of the existence of metal-metal quadruple bonds. Cotton's discovery demonstrated that multiple bonding in inorganic systems is not governed by the same constraints observed in organic chemistry regarding s and p orbital involvement. The d orbitals are involved in the multiple bonding description. The quadruple bond involves considerable d orbital overlap between adjacent metal centers. Part I of this series of papers focuses upon the impact of this discovery and describes further contributions to the development of the field. Multiple metal-metal bonding now is known to permeate broad areas of transition metal chemistry. The understanding of metal-metal bonding that developed as a result of the discovery of multiple metal-metal bonding awakened a new chemistry involving metal clusters. Clusters were defined by Cotton to be species containing metal-metal bonding. Clusters in catalysis therefore seemed a logical grouping of papers in this symposium. Clusters play an every increasing role in the control of chemical reactions. Part II of this book describes some of the interesting new developments in this field. In Part III the papers examine the role clusters play in describing and understanding solid state materials.







Metal-Ligand Interactions in Organic Chemistry and Biochemistry


Book Description

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 Multiple Bonds as Single Atom Sources for the Assembly of New Ligands


Book Description

Atom transfer reactions such as HAT (hydrogen atom transfer) and OAT (oxygen atom transfer) offer a method for efficient bond formation in a single step. Extending this concept, this single atom delivery also has the potential to provide an effective route to otherwise inaccessible ligands. In this work, we investigate the utility of the tris(carbene)borate iron(IV) nitride, PhB(iPr2Im)3Fe≡N, as a viable nitrogen atom source for the assembly of new ligands. In one embodiment of this approach, an unusual carbon atom transfer reaction leads to the assembly of a C≡N− ligand when two equivalents of bis(diisopropylamino)cyclopropenylidene (BAC) carbene are added to PhB(iPr2Im)3Fe≡N. This strategy is extended to access of the elusive gas molecule, P≡N, which is assembled by using (N3N)Mo≡P (N3N = [N(CH2CH2NSiMe3)3]3−) and PhB(iPr2Im)3Fe≡N as P- and N-atom sources, respectively. These are the first structurally characterized compounds with this unique ligand. Photoisomerization of the P≡N ligand is observed in the solid-state and trapping of the N≡P linkage isomer reveals the fluxionality of this ligand in solution. Additionally, the bis(carbene)borate ligand framework is also explored as supporting ligand for the development of new metal-ligand multiply bonded complexes with the first structural characterization of an Fe(VI) compound, the highest oxidation state of iron, being achieved.