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Author: María Viviana Lomelí Tapuach
Publisher:
ISBN:
Category : Oxidation
Languages : en
Pages : 292
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Author: María Viviana Lomelí Tapuach
Publisher:
ISBN:
Category : Oxidation
Languages : en
Pages : 292
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Book Description
Author: Zhigang Tian
Publisher:
ISBN:
Category :
Languages : en
Pages : 396
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Author: Simon James Bonyhady
Publisher:
ISBN:
Category :
Languages : en
Pages : 594
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Book Description
This thesis pertains to the synthesis and stabilisation of low oxidation state main group element complexes through the utilisation of novel magnesium(I) dimers as reducing agents. As such, it is an exploration of the utility of these magnesium(I) complexes in organometallic synthesis and has resulted in the isolation of a number of compounds featuring unusual structural motifs, oxidation states and bonding modes.Chapter 1 provides a general introduction to low oxidation state main group chemistry and discusses a number of concepts that are unique to this field of study. Particular attention is paid to historical concepts such as the "double bond rule" and the new understanding of chemical bonding that has developed as a result of this "renaissance" in main group chemistry, as well as a general discussion of synthetic methods to access these compounds.Chapter 2 introduces the magnesium(I) dimers reported to date and details both their synthesis and reactivity in organic and organometallic synthesis. Two new [beta]-diketiminato magnesium(I) complexes are described, along with their [beta]-diketiminato magnesium(II) halide precursor complexes, and efforts towards improving the synthesis of these unusual compounds are outlined. A number of other novel [beta]-diketiminato magnesium(II) hydride, alkyl and halide complexes are also presented. Finally, efforts towards the synthesis of soluble models of magnesium amido-boranes, in which this library of magnesium(I and II) complexes is exploited, are also discussed.Chapter 3 presents a case study into the utility of magnesium(I) dimers as reducing agents in organometallic synthesis. A series of amidinato group 14 element(I) dimers [LEEL] (E = Si, Ge, Sn; L = amidinate) were synthesised in high to moderate yield, and comparisons between the magnesium(I) dimers and traditional reducing agents emphasised the efficacy of the magnesium(I) dimers in this role. The tin compound is the first of its type, while one and two previous examples exist for the silicon and germanium complexes, respectively, although they were only isolated in low yield.Chapter 4 describes the development of low oxidation state aluminium hydride chemistry, an area in which magnesium(I) dimers have been instrumental. A number of novel compounds are presented including of a series of compounds which feature remarkable [Al6H6] octahedral cores.Chapter 5 details efforts to extend the use of magnesium(I) dimers to compounds stabilised by bulky terphenyl ligands. The preparation of the second example of a diplumbyne, for which a moderate yielding synthesis was determined, is described. A dialumene and a disilyne were also desirable synthetic targets, and efforts to these ends are also outlined.Finally, Chapter 6 provides a summary of the results presented in this thesis.
Author: R.A. Mackay
Publisher: CRC Press
ISBN: 148226840X
Category : Science
Languages : en
Pages : 625
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Book Description
This popular and comprehensive textbook provides all the basic information on inorganic chemistry that undergraduates need to know. For this sixth edition, the contents have undergone a complete revision to reflect progress in areas of research, new and modified techniques and their applications, and use of software packages. Introduction to Modern Inorganic Chemistry begins by explaining the electronic structure and properties of atoms, then describes the principles of bonding in diatomic and polyatomic covalent molecules, the solid state, and solution chemistry. Further on in the book, the general properties of the periodic table are studied along with specific elements and groups such as hydrogen, the 's' elements, the lanthanides, the actinides, the transition metals, and the "p" block. Simple and advanced examples are mixed throughout to increase the depth of students' understanding. This edition has a completely new layout including revised artwork, case study boxes, technical notes, and examples. All of the problems have been revised and extended and include notes to assist with approaches and solutions. It is an excellent tool to help students see how inorganic chemistry applies to medicine, the environment, and biological topics.
Author: Timothy P. Hanusa
Publisher: John Wiley & Sons
ISBN: 1118751434
Category : Science
Languages : en
Pages : 496
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Book Description
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
Author: Tristan Chivers
Publisher: Taylor & Francis
ISBN: 9782884491686
Category :
Languages : en
Pages : 522
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Author: Jiaye Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 410
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Book Description
This thesis concerns research into the synthesis of low oxidation state group 14 complexes and their reactivity towards small molecule activation. A number of group 14 complexes in the +1 or +2 oxidation states have been synthesized. These include the first singly-bonded amido germanium(I) complex (amido-digermyne, [LGeGeL], L = {N(MeAr)(SiMe3)}, MeAr = C6H2{C(H)Ph2}2Me-2,6,4), amido group 14 metal(II) halide complexes, e.g. [LECl] (E = Ge, Sn or Pb, SiR3 = SiMe3, SiPh2Me or SiPh3), and amido silicon(IV) halide complexes, e.g. [LSiX3] (X = Cl or Br). The reactivity of the amido digermyne towards a variety of small molecules, e.g. H2, CO2, N2O, CS2, alkynes, etc., has been examined. In addition, the synthesis of "one-coordinate" group 14 metal(II) monocationic complexes (e.g. [LE]+[PF]-, E = Ge or Sn, PF = [Al{OC(CF3)3}4]- ) has been investigated and their reactivity towards Lewis base molecules has been examined. Work included in this thesis can be divided into six chapters. Chapter 1 introduces recent developments in main group chemistry, bonding in low oxidation state main group compounds, kinetic stabilization, and the "inert pair" effect. Some examples of low oxidation state main group complexes are described.Chapter 2 introduces the synthesis and coordination chemistry of a series of bulky secondary amines, [(MeAr)(SiR3)NH], [(iPrAr)(SiMe3)NH] (iPrAr = C6H2{C(H)Ph2}2iPr-2,6,4) and [(tBuAr)(SiR3)NH] (tBuAr = C6H2{C(H)Ph2}2tBu-2,6,4). Subsequently, the chapter discusses the synthesis of amido group 14 metal(II) halide complexes, e.g. [LECl] (E = Ge, Sn or Pb; SiR3 = SiMe3, SiPh2Me or SiPh3), [{(iPrAr)(SiMe3)N}ECl] (E = Ge or Sn) and {(tBuAr)(SiMe3)N}GeCl. The structures of these complexes have been determined using X-ray crystallography. Furthermore, amido silicon(IV) halide complexes, [LSiX3] (SiR3 = SiMe3, SiPh2Me or SiPh3; X = Cl or Br) and [{(iPrAr)(SiR3)N}SiBr3], as well as an amido silicon hydride, [LSi(H)Cl2] have been synthesized and structurally investigated. Chapter 3 discusses the synthesis and structural characterization of the first singly-bonded amido-digermyne, [LGeGeL], and its reactivity towards small gas molecule activation, e.g. that of H2, CO2, N2O, etc. at ambient and low temperatures. These reactions produced bulky amido germanium(II) and germanium(III) hydride complexes, and a bis(germylene) oxide complex. Further efforts have been devoted to the reactivity of [LGeGeL] towards molecules such as CS2, tBuNC and tBuNCO. Chapter 4 expands on the reactivity of [LGeGeL] and [L#GeGeL#] (L# = (iPrAr)(SiiPr3)N). It describes reactions that have been carried out with organic molecules, e.g. cyclooctatetraene (COT), 4-dimethylaminopyridine (DMAP), azobenzene, 1,4-bis(trimethylsilyl)butadiyne, norbornadiene, etc. These reactions produced a number of low oxidation state germanium complexes. In general, the reactions of [LGeGeL] and [L#GeGeL#] with unsaturated molecules produced products with the substrate inserted into the Ge-Ge bond. However, the reaction with DMAP produced a bis-adducted germanium complex with a shortened Ge-Ge bond. Finally, reactions of [LGeGeL] with chlorinated compounds, iodine, and ketones are discussed. Chapter 5 summarizes investigations into the synthesis and coordination chemistry of the first examples of bulky amido "one-coordinate" germanium(II) and tin(II) monocationic complexes, [LE]+[PF]- (E = Ge or Sn, PF = [Al{OC(CF3)3}4]-) and [L'Sn]+[PF]- (L' = [(MeAr)(SiPh2Me)N]). Their reactivity towards DMAP was investigated, and this led to two-coordinate adducted germanium or tin cationic complexes. Chapter 6 summarizes miscellaneous results, and consists of two sections. The first section discusses theoretical investigations into the Mo-Ge bonding of singly-bonded or triply-bonded molybdenum germylene and germylyne complexes. Wiberg bond indices (WBI) were acquired to provide a quantitative description of the bonding in these complexes. The second section focuses on investigations into the synthesis of a bulky gallium(I) amide complex, [LGa:], which was prepared from the reaction of [{(MeAr)(SiMe3)N}Li] and "GaI". X-ray crystallographic studies of [LGa:] were carried out and indicate that the complex is essentially one-coordinate.
Author: Abhik Ghosh
Publisher: John Wiley & Sons
ISBN: 1118173988
Category : Science
Languages : en
Pages : 356
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Book Description
Involved as it is with 95% of the periodic table, inorganic chemistry is one of the foundational subjects of scientific study. Inorganic catalysts are used in crucial industrial processes and the field, to a significant extent, also forms the basis of nanotechnology. Unfortunately, the subject is not a popular one for undergraduates. This book aims to take a step to change this state of affairs by presenting a mechanistic, logical introduction to the subject. Organic teaching places heavy emphasis on reaction mechanisms - "arrow-pushing" - and the authors of this book have found that a mechanistic approach works just as well for elementary inorganic chemistry. As opposed to listening to formal lectures or learning the material by heart, by teaching students to recognize common inorganic species as electrophiles and nucleophiles, coupled with organic-style arrow-pushing, this book serves as a gentle and stimulating introduction to inorganic chemistry, providing students with the knowledge and opportunity to solve inorganic reaction mechanisms. • The first book to apply the arrow-pushing method to inorganic chemistry teaching • With the reaction mechanisms approach ("arrow-pushing"), students will no longer have to rely on memorization as a device for learning this subject, but will instead have a logical foundation for this area of study • Teaches students to recognize common inorganic species as electrophiles and nucleophiles, coupled with organic-style arrow-pushing • Provides a degree of integration with what students learn in organic chemistry, facilitating learning of this subject • Serves as an invaluable companion to any introductory inorganic chemistry textbook
Author: Simon Aldridge
Publisher: John Wiley & Sons
ISBN: 0470681918
Category : Science
Languages : en
Pages : 763
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Book Description
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.
Author: Sergio Carrà
Publisher: EOLSS Publications
ISBN: 1905839596
Category :
Languages : en
Pages : 516
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Book Description
Fundamentals of Chemistry theme in two volumes, is a component of Encyclopedia of Chemical Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The Theme is organized into six different topics which represent the main scientific areas : History and Fundamentals of Chemistry; Chemical Experimentation and Instrumentation; Theoretical Approach to Chemistry; Chemical Thermodynamics; Rates of Chemical Reactions; Chemical Synthesis of Substances. These two volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs
