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Diketiminate Beta Diketiminate Ligands As Supports For Alkaline Earth And Aluminum Complexes
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Book Synopsis Beta -Diketiminate Ligands as Supports for Alkaline Earth and Aluminum Complexes: Synthesis, Characterization, and Reactivity Studies by : Sarish Sankaranarayana Pillai
Download or read book Beta -Diketiminate Ligands as Supports for Alkaline Earth and Aluminum Complexes: Synthesis, Characterization, and Reactivity Studies written by Sarish Sankaranarayana Pillai and published by . This book was released on 2009 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Β−diketiminate [Beta-diketiminate] Ligands as Supports for Alkaline Earth and Aluminum Complexes by : Sarish Sankaranarayana Pillai
Download or read book Β−diketiminate [Beta-diketiminate] Ligands as Supports for Alkaline Earth and Aluminum Complexes written by Sarish Sankaranarayana Pillai and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel [beta]-diketiminates and [beta]-diketiminate Derivatives for the Synthesis of Main Group Complexes by : Brant James Maitland
Download or read book Novel [beta]-diketiminates and [beta]-diketiminate Derivatives for the Synthesis of Main Group Complexes written by Brant James Maitland and published by . This book was released on 2015 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is primarily concerned with the synthesis of low oxidation state alkaline earth metal complexes featuring novel [beta]-diketiminate ligands and their derivatives. The syntheses of a variety of different [beta]-diketiminates possessing extreme steric bulk, as well as those that have been electronically modified are detailed. These ligands have been used to produce a variety of different alkali metal, alkaline earth metal and lanthanide complexes.Chapter 1 provides a general introduction to low oxidation state alkaline earth metal chemistry. Particular attention is given to metal complexes featuring [beta]-diketiminates, given their central role in the research making up this thesis.Chapter 2 deals with the synthesis of a range of novel, sterically hindered [beta]-diketimines. These pro-ligands were targeted in the belief that their extreme bulk would allow the synthesis of currently unknown structural motifs.Chapter 3 is primary concerned with the exploitation of the developed sterically hindered [beta]-diketimines in the synthesis of a variety of alkali metal, alkaline earth metal and lanthanide complexes. A range of three coordinate magnesium complexes were produced using the developed ligands, most notably, the first crystallographically characterised [beta]-diketiminato magnesium hydride. In our quest for a calcium(I) dimer, a complex type which is currently unknown, a variety of [beta]-diketiminato calcium iodides were produced. The attempted reduction of these heteroleptic metal iodide complexes resulted not in the targeted low oxidation state complexes, but in two different calcium(II) dimers.In Chapter 4, the [beta]-diketimine ligand was adapted, resulting in two separate classes of pro-ligands. The first, a 1,3,5-triazapentadiene, has had the central carbon replaced by nitrogen. The second, instead of having the typical methyl groups on the ligand backbone, has dialkylamino groups. In each instance, it was envisaged that the ligands would donate additional electron density, and bind more strongly to the metal centre in coordination complexes, when compared to the standard [beta]-diketiminate ligand class. Six separate heteroleptic magnesium(II) iodide complexes have been developed from these ligands, the majority of which show promise as precursors to low oxidation state magnesium complexes.Chapter 5 details several new secondary amines which have been produced as pro-ligands for low oxidation state main group chemistry. In addition, preliminary studies have shown that these ligands have potential in coordination chemistry.
Book Synopsis Beta -Diketiminate Ligand Supported Group 2 Metal Hydroxide, Halide, Oxygen Bridged Heterobimetallic and Heterotrimetallic Complexes by : Sharanappa Nembenna
Download or read book Beta -Diketiminate Ligand Supported Group 2 Metal Hydroxide, Halide, Oxygen Bridged Heterobimetallic and Heterotrimetallic Complexes written by Sharanappa Nembenna and published by . This book was released on 2007 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Β-diketiminate [Beta-diketiminate] Ligand Supported Group 2 Metal Hydroxide, Halide, Oxygen Bridged Heterobimetallic and Heterotrimetallic Complexes by : Sharanappa Nembenna
Download or read book Β-diketiminate [Beta-diketiminate] Ligand Supported Group 2 Metal Hydroxide, Halide, Oxygen Bridged Heterobimetallic and Heterotrimetallic Complexes written by Sharanappa Nembenna and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Structure, and Reactivity of Group 13 Diketiminate Complexes by : Baixin Qian
Download or read book Synthesis, Structure, and Reactivity of Group 13 Diketiminate Complexes written by Baixin Qian and published by . This book was released on 1999 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Bulky Dipyrromethene Complexes of Aluminum, Zinc and Rhodium by : Christopher G. Gianopoulos
Download or read book Development of Bulky Dipyrromethene Complexes of Aluminum, Zinc and Rhodium written by Christopher G. Gianopoulos and published by . This book was released on 2014 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of dipyrromethene ligands is dominated by boron difluoride luminophores (BODIPY), which are commercially important laser dye materials and have also found application to imaging/staining biological samples. Despite the importance of BODIPY complexes, dipyrromethene complexes of the heavier group 13 elements are scarce. Our interest in bulky dipyrromethene ligands is based on analogy to popular ß-diketiminate ligands that have found use in stabilizing unusual metal complexes on the basis of steric protection. The preparation and characterization of aluminum, zinc and rhodium complexes of bulky dipyrromethene ligands is the subject of the following discourse. The preparation and characterization of aluminum alkyl, aryl and hydride complexes of 1,9-dimesityl-5-phenyldipyrromethene is reported in chapter two. The synthesis and characterization of a bimetallic aluminoxane with terminal hydride coligands is also reported. The preparation and characterization of dimethylaluminum complexes of 1,9-dimesityl-5-pentafluorophenyldipyrromethene and 1,9-dimesityl-5-(2'-pyridyl)dipyrromethene are also reported. These compounds have been characterized by NMR spectroscopy and X-ray crystallography. The structural data clearly demonstrate similarities and differences of the steric environment of dipyrromethene and ß-diketiminate ligands. The alkyl and aryl aluminum complexes are surprisingly robust and tolerate exposure to air, moisture and even silica gel chromatography. We have proposed that the stability of these compounds is due to kinetic stabilization afforded by the steric environment of the bulky dipyrromethene ligand. The preparation of aluminum complexes of 1,9-dimesityl-5-phenyldipyrromethene is extended in chapter 3. In this chapter, the preparation of aluminum complexes with halide, alkoxide and amido coligands is reported. These complexes were characterized by NMR spectroscopy and X-ray crystallography. The alkoxide and amido complexes were also evaluated for their ability to initiate the polymerization of e-caprolactone and preliminary results are discussed. Unfortunately, these aluminum complexes are poor catalysts for caprolactone polymerization, which only proceeds at elevated temperature. Furthermore, the aluminum catalysts are sensitive to impurities in the lactone monomer and catalysis was often found to halt after long reaction times. As mentioned previously, we became interested in the chemistry of aluminum complexes of dipyrromethene ligands based on analogy to ß-diketiminate ligands. ß-Diketiminate ligands have found use in stabilizing rare metal complexes, such as terminal imido complexes of aluminum. A major aim of our work with dipyrromethenes is to identify a system capable of stabilizing aluminum complexes with terminal divalent coligands such as imido or alkylidene ligands. In chapter 4, theoretical calculations performed at the DFT level are presented. The electronic structure of dipyrromethene aluminum complexes with terminal imido and alkylidene coligands was calculated as well as the thermochemical parameters of reactions to prepare such complexes. Synthetically viable substitutions were made in order to determine the effect of electronic perturbations (to the dipyrromethene or alkylidene coligand) on the stability of terminal alkylidene complexes of aluminum. The results of this chapter show that a terminal alkylidene of aluminum must be formed from an Al(I) precursor, rather than Al(III), and also that modification of the electronics of these systems has little effect on the stability of the resulting complexes. These results indicate that isolation of a stable, terminal alkylidene complex of aluminum will likely require kinetic stabilization of the reactive alkylidene moiety by use of steric bulk rather than stabilization through electronic modification to the system. Chapter 5 concerns the preparation and characterization of zinc halide, alkyl and alkoxide complexes of 1,9-dimesityl-5-phenyldipyrromethene. These compounds have been characterized by NMR spectroscopy and X-ray crystallography. The preparation of monomeric zinc alkoxides has been challenging and results to this aim are discussed at length. As an extension of the work reported in chapter 3, we have also explored the polymerization of e-caprolactone initiated by zinc alkoxide complexes and preliminary results will be discussed. In chapter 6 the preparation and characterization of rhodium(I) 1,5-cyclooctadiene (COD), carbon monoxide (CO) and arene complexes of 1,9-dimesityl-5-pentafluorophenyldipyrromethene are reported. These complexes were characterized by NMR spectroscopy and X-ray crystallography. Results from this chapter demonstrate the flexibility of the dipyrromethene ligand to accommodate square-planar coordination to rhodium(I). The preparation of low-coordinate rhodium complexes is also discussed. Chapter 7 reports the synthesis of Cr(TPP)Cl(THF), a component of the Coates system for carbonylation of epoxides, by a previously unreported method. Traditionally, Cr(TPP)Cl(THF) is prepared from divalent or zero-valent chromium precursors that are expensive, air-sensitive materials. Our method involves the use of inexpensive, air-stable trivalent chromium. Appendix 1 reports the synthesis and characterization of three compounds which were prepared as parts of side projects. The experimental details and crystal structures are reported, discussion is however kept to a minimum. The compounds presented in the appendix include nickel bromide and chromium chloride complexes of 1,9-dimesityl-5-phenyldipyrromethene and also a pseudo-octahedral homoleptic aluminum complex ligated by 2-(2'-pyridyl)pyrrole.
Book Synopsis s-Block Metal Complexes by : Matthias Westerhausen
Download or read book s-Block Metal Complexes written by Matthias Westerhausen and published by MDPI. This book was released on 2018-06-27 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "s-Block Metal Complexes" that was published in Inorganics
Book Synopsis Early Main Group Metal Catalysis by : Sjoerd Harder
Download or read book Early Main Group Metal Catalysis written by Sjoerd Harder and published by John Wiley & Sons. This book was released on 2020-04-06 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early Main Group Metal Catalysis gives a comprehensive overview of catalytic reactions in the presence of group 1 and group 2 metals. Chapters are ordered to reaction type, contain educational elements and deal with concepts illustrated by examples that cover the main developments. After a short introduction on polar organometallic chemistry and synthesis of early main group metal complexes, a variety of catalytic reactions are described, e.g. polymerization of alkenes, hydroamination and phosphination reactions, hydrosilylation, hydroboration and hydrogenation catalysis, as well as enantioselective and Lewis-acid catalysis. The book addresses organic chemists and researchers in industry interested in the state-of-the-art and new possibilities of early main group metal catalysis as well as newcomers to the field. Written by a team of leaders in the field, it is a very welcome addition to the area of main group metal chemistry, and to the field of catalysis.
Book Synopsis The Lightest Metals by : Timothy P. Hanusa
Download or read book The Lightest Metals written by Timothy P. Hanusa and published by John Wiley & Sons. This book was released on 2015-10-12 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first seven metals in the periodic table are lithium, beryllium, sodium, magnesium, aluminium, potassium and calcium, known collectively as the “lightest metals”. The growing uses of these seven elements are enmeshing them ever more firmly into critical areas of 21st century technology, including energy storage, catalysis, and various applications of nanoscience. This volume provides comprehensive coverage of the fundamentals and recent advances in the science and technology of the lightest metals. Opening chapters of the book describe major physical and chemical properties of the metals, their occurrence and issues of long-term availability. The book goes on to disucss a broad range of chemical features, including low oxidation state chemistry, organometallics, metal-centered NMR spectroscopy, and cation-π interactions. Current and emerging applications of the metals are presented, including lithium-ion battery technology, hydrogen storage chemistry, superconductor materials, transparent ceramics, nano-enhanced catalysis, and research into photosynthesis and photoelectrochemical cells. The content from this book will be added online to the Encyclopedia of Inorganic and Bioinorganic Chemistry: http://www.wileyonlinelibrary.com/ref/eibc
Book Synopsis Steric and Electronic Effects of the [beta]-diketiminate Ligand on Low-coordinate Iron Complexes by : Sarina M.. Bellows
Download or read book Steric and Electronic Effects of the [beta]-diketiminate Ligand on Low-coordinate Iron Complexes written by Sarina M.. Bellows and published by . This book was released on 2014 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This work focuses on the steric and electronic effects of the [beta]-diketiminate ligand when coordinated to iron. Smaller [beta]-diketiminates were used in comparison to their bulkier analogues. The effects of the [beta]-diketiminate on iron complexes and their reactivities were investigated by density function theory studies, kinetic studies, and by comparing spectroscopic data to analogous compounds. Chapter 1 introduces the various [beta]-diketimines and their synthetic preparations. This supporting ligand can provide a range of steric hindrance which has resulted in differences in reactivity of the iron complexes. The few studies of [beta]-diketimines with electron withdrawing groups are discussed in detail to understand the current knowledge of electronic effects of the [beta]-diketiminate ligand. Chapter 2 describes the DFT study of [beta]-hydride elimination via high-spin iron(II)- and cobalt(II)-alkyl complexes. For these high-spin complexes to acquire the empty d orbital necessary for [beta]-hydride elimination a spin flip must occur to access a lower spin state. In the iron(II)-alkyl and cobalt(II)-alkyl complexes, a spin crossover mechanism was calculated to occur in order to obtain the lowest energy transition state through a lower spin state than the starting alkyl complex. This study has also given insight into an iron(II) complex that is resistant to [beta]-hydride elimination due to the steric hindrance of the ligand. Chapter 3 describes the synthesis of a ([beta]-diketiminate)iron(I) dimer and a ([beta]-diketiminate)iron(III)-imido dimer. The imido complex was formed by the N=N bond cleavage of the azobenzene substrate. Kinetic and DFT studies were performed to elucidate the mechanism of N=N bond cleavage. Chapter 4 describes two new synthetic routes to a new [beta]-diketiminate ligand with trifluoromethyl groups as electron withdrawing substituents. This ligand was used to produce low-coordinate iron complexes analogous to previously published complexes without an electron withdrawing [beta]-diketiminate ligand as an effort to ascertain the electronic effects of the [beta]-diketiminate ligand on the iron and the other coordinated ligands"--Pages viii-ix.
Book Synopsis The Group 13 Metals Aluminium, Gallium, Indium and Thallium by : Simon Aldridge
Download or read book The Group 13 Metals Aluminium, Gallium, Indium and Thallium written by Simon Aldridge and published by John Wiley & Sons. This book was released on 2011-04-11 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last two decades have seen a renaissance in interest in the chemistry of the main group elements. In particular research on the metals of group 13 (aluminium, gallium, indium and thallium) has led to the synthesis and isolation of some very novel and unusual molecules, with implications for organometallic synthesis, new materials development, and with biological, medical and, environmental relevance. The Group 13 Metals Aluminium, Gallium, Indium and Thallium aims to cover new facts, developments and applications in the context of more general patterns of physical and chemical behaviour. Particular attention is paid to the main growth areas, including the chemistry of lower formal oxidation states, cluster chemistry, the investigation of solid oxides and hydroxides, advances in the formation of III-V and related compounds, the biological significance of Group 13 metal complexes, and the growing importance of the metals and their compounds in the mediation of organic reactions. Chapters cover: general features of the group 13 elements group 13 metals in the +3 oxidation state: simple inorganic compounds formal oxidation state +3: organometallic chemistry formal oxidation state +2: metal-metal bonded vs. mononuclear derivatives group 13 metals in the +1 oxidation state mixed or intermediate valence group 13 metal compounds aluminium and gallium clusters: metalloid clusters and their relation to the bulk phases, to naked clusters, and to nanoscaled materials simple and mixed metal oxides and hydroxides: solids with extended structures of different dimensionalities and porosities coordination and solution chemistry of the metals: biological, medical and, environmental relevance III-V and related semiconductor materials group 13 metal-mediated organic reactions The Group 13 Metals Aluminium, Gallium, Indium and Thallium provides a detailed, wide-ranging, and up-to-date review of the chemistry of this important group of metals. It will find a place on the bookshelves of practitioners, researchers and students working in inorganic, organometallic, and materials chemistry.
Download or read book Boronic Acids written by Dennis G. Hall and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, the whole field of organoboronic acids is presented in one comprehensive handbook. Professor Dennis Hall, a rising star within the community, covers all aspects of this important substance class, including applications in chemistry, biology and medicine. Starting with an introduction to the structure, properties, and preparation of boronic acid derivatives, together with an overview of their reactions and applications, the book goes on to look at metal-catalyzed borylation of alkanes and arenas, coupling reactions and rhodium-catalyzed additions of boronic acids to alkenes and carbonyl compounds. There follows chapters on copper-promoted C-O and C-N cross-coupling of boronic acids, recent applications in organic synthesis, as well as alpha-haloalkylboronic esters in asymmetric synthesis. Later sections deal with cycloadditions, organoboronic acids, oxazaborolidines as asymmetric inducers, and boronic acid based receptors and sensors. The whole is rounded off with experimental procedures, making this invaluable reading for organic, catalytic and medicinal chemists, as well as those working in organometallics.
Book Synopsis Alkaline-Earth Metal Compounds by : Sjoerd Harder
Download or read book Alkaline-Earth Metal Compounds written by Sjoerd Harder and published by Springer. This book was released on 2013-07-20 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Organometallic Chemistry presents critical overviews of research results in organometallic chemistry. As our understanding of organometallic structure, properties and mechanisms increases, new ways are opened for the design of organometallic compounds and reactions tailored to the needs of such diverse areas as organic synthesis, medical research, biology and materials science. Thus the scope of coverage includes a broad range of topics in pure and applied organometallic chemistry, where new breakthroughs are being achieved that are of significance to a larger scientific audience. The individual volumes of Topics in Organometallic Chemistry are thematic. Review articles are generally invited by the volume editors.
Book Synopsis Comprehensive Coordination Chemistry II by : J. A. McCleverty
Download or read book Comprehensive Coordination Chemistry II written by J. A. McCleverty and published by Newnes. This book was released on 2003-12-03 with total page 11845 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.
Book Synopsis Molecular Clusters of the Main Group Elements by : Matthias Driess
Download or read book Molecular Clusters of the Main Group Elements written by Matthias Driess and published by John Wiley & Sons. This book was released on 2008-11-21 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 20 contributions from leading research groups, this book provides essential information for chemists and materials scientists working with molecular clusters. It treats both homonuclear and heteronuclear clusters, including: the theory and concepts in main-group cluster chemistry, * novel boranes and heteroboranes, * silicon/germanium/tin clusters, * alkali metal suboxides, * clusters in alloys with mercury, * chalkogen clusters * and numerous other compound classes. The whole is illustrated by examples of the great potential for technical applications such as electron storage, cancer therapy and in optoelectronic devices. Its systematic coverage of all relevant main group elements makes this the prime reference source in the field.
Book Synopsis Activation of Small Molecules by : William B. Tolman
Download or read book Activation of Small Molecules written by William B. Tolman and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.
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