Download or read book Thiolato hydride Complexes of Molybdenum written by M. J. Maguire and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thiolato hydride Complexes of Molybdenum written by and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation and Reaction of the Thiolate Hybride Complexes of Molybdenum written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes studies on the synthesis and reactivity of a variety ofmolybdenum thiolate hydride complexes; tungsten complexes were also prepared forcomparison. The original purpose of this research was to examine the behaviour of sulphurligatedmolybdenum complexes as models for the molybdenum site in nitrogenase, but thiswork has demonstrated that the 5-coordinated complexes [MoH(SC6H2R3-2,4,6)3(PR1Ph2)] (R= Me or Pr'; R1 = Me or Et) are very reactive versatile starting materials for thepreparation of a wide range of derivatives, some of which model aspects of the chemistry ofother molybdenum enzymes such as xanthine oxidase.It is known that the reaction of thiols HSC6H2R3-2,4,6 with [MoH4(PR'Ph2)4] or trans-[Mo(N2)2(PMePh2)4] produces unsaturated thiolato-hydride complexes of molybdenum(IV)[MoH(tipt)3(PMePh2)] (A) (tipt = SC6H2PrV-2,4,6). Here we report an extension of thesestudies in which we have prepared the oxygen-sensitive, five- and six-coordinated complexes[MoH(SC6H4F)3(PMePh2)] (2.3) and [MoH(SC6HF4-2,3,5,6)3(PMePh2)2] (2.1) and[MoH(SC6F5)3(PMePh2)2] (2.4).Some reactions of (2.3), (2.1) and (2.4) have been investigated, including the reactionof (2.4) with carbon monoxide which yields [Mo(SC6F5)2(CO)2(PMePh2)2] (6.7). Thereaction of (2.1) with pyridine gives [MoH(SC6HF4-2,3,5,6)3(C5H5N)(PMePh2)] (6.1).The reaction of the electron-deficient hydride thiolate complex [MoH(tipt)3(PMe2Ph)2](B) with phenylacetylene gives the novel square pyramidal, diamagnetic phosphoniumalkylidenecomplex[MoO{=C(Ph)CH=C(Ph)CH2PMe2Ph)(SC6H2Pri3-2,4,6)3](3E), whereasthe reaction of /Molylacetylene with (A) yields the novel phosphonium ylide complex[MoO(SC6H2Pri3)2(HC=CC6H4Me-4){(C6H4Me-4) (C=CHPMePh2)}](3D),thathas relevanceto the species derived from xanthine oxidase when it is inhibited by aldehydes. These twocomplexes have been characterised by X-ray structure determination. [WH(tipt)3(PMe2Ph)2j(C) with phenylacetylene and p-tolylacetylene gives products resulting from oligomerisationreactions.In the reaction o f [MoH(tipt)3(PMePh2)] (A) with hydrazines, both binding of hydrazineto Mo and disproportionation/reduction have been observed. The bright green andtemperature- and oxygen-sensitive complex [MoH(tipt)3(NH3)(PMePh2)J (4.1) has beenobtained from the reaction of NH2NH2 with (A). Its X-ray structure determination at -10°Cshows that it is a hydride ammonia complex with trigonal bipyramidal geometry. Thereaction of phenylhydrazine with (A) gives dark green single crystals that have been thesubject of an X-ray crystallographic analysis. This compound crystallised in a much-distortedtrigonal bipyramidal geometry and is formulated as [MoH(tipt)3(NH2NHPh)(PMePh2)] (4.4).Isocyanides are substrates or inhibitors of nitrogenase. The interaction of isocyanides withthe five- and six-coordinate hydride complexes has been investigated. The reaction of[MoH(tipt)3(PMePh2)] (A) with MeNC and t-BuNC and also the reaction of[WH(tipt)3(PMe2Ph)2] (C) with MeNC, produce [MoH(tipt)2(MeNC)4] (5.1), [MoH(tipt)2('-BuNC)4] (5.3) and [WH(tipt)2(MeNC)4] (5.2) respectively. The structures of these complexeshave been confirmed by X-ray structure determination.The reaction of molybdenum hydride complexes with carboxylic acids give productswhich show carboxylate groups in their IR and NMR spectra.
Download or read book Preparation and Reaction of the Thiolate Hydride Complexes of Molybdenum written by Katayoun Marjani and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thiolato complexes of Molybdenum Tungsten and Rhenium written by P. J. Blower and published by . This book was released on 1984 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geschichte der Jugendseelsorge written by and published by . This book was released on 1965 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactions of Molybdenum Complexes with Sulphur containing Reagents written by C. Shortman and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dinitrogen and Hydride Complexes of Molybdenum with Phosphorus and Sulfur donor Coligands written by Natalie Joan Lazarowych and published by . This book was released on 1989 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Chemical and Structural Characterization of Molybdenum hydrazido 2 Complexes with Tridentate Thiolate Ligands written by Lisa M. Throop and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molybdenum written by E.R. Braithwaite and published by Elsevier. This book was released on 2013-10-22 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molybdenum is an element with an extremely rich and interesting chemistry having very versatile applications in various fields of human activity. It is used extensively in metallurgical applications. Because of their anti-wear properties, molybdenum compounds find wide applications as lubricants - particularly in extreme or hostile environmental situations. Many molybdates and heteropolymolybdates are white and therefore used as pigments. In addition, they are non-toxic and act as efficient corrosion inhibitors and smoke suppressants. Hydroprocessing of petroleum is one of the largest industries employing heterogeneous catalysts. Molybdenum catalysts have shown great promise in the liquefaction of coal and this may develop into one of its most important catalytic uses. The use of molybdenum compounds in homogeneous catalysis is also significant. Three important classes of molybdenum compounds in the solid state are reviewed, viz., oxides, sulphides and halides. The role of molybdenum in inorganic catalysis and enzymes receives prominent mention because of their impact on the progress of science and technology. Further biochemical and enzymic factors are discussed in separate chapters and their reaction to agriculture and animal husbandry. A new classification of covalent compounds which abandons the traditional oxidation state concept allows a powerful approach to the organisation of the complex and rich chemistry of molybdenum. Dramatic colour diagrams of abundances of molybdenum compounds provide broad insights into the important features and trends in the chemistry of molybdenum including reactivity and mechanism. The book is intended for use mainly as a research monograph by the many workers who may encounter molybdenum chemistry or who are looking for its application and potential uses in different technological fields. However, it will also serve as an advanced text for university lecturers and postgraduate students interested in inorganic, physical and industrial chemistry, chemical technology or biochemistry and biotechnology.
Download or read book Molybdenum IV Imido Silylamido and Hydride Complexes written by Andrey Y. Khalimon and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Catalytic Studies of Molybdenum Thiolate Complexes and Copper Complexes with Substituted NS2 macrocyclic Ligands written by Antony Alex Tipton and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition Metal Sulphides written by Th. Weber and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrotreating catalysis with transition metal sulphides is one of the most important areas of industrial heterogeneous catalysis. The present book deals with the chemical and catalytic aspects of transition metal sulphides, focusing on their use in hydrotreating catalysis. The book¿s 12 chapters present reviews of solid-state, coordination and organometallic chemistry, surface science and spectroscopic studies, quantum chemical calculations, catalytic studies with model and real catalysts, as well as refinery processes. A presentation of state-of-the-art background to pertinent work in the field. Can be used as an introduction to the chemical and catalytic properties of transition metal sulphides as well as an advanced level reference.
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.
Download or read book Synthesis and Reactivity of Alkenyl Thiolate bridged Molybdenum IV Dinuclear Cationic Complexes written by Rolf Thomas Weberg and published by . This book was released on 1986 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Molybdenum Hydrides with Nitrosyl and Phosphine Ligands written by Fupei Liang and published by . This book was released on 2001 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Chemical and Structural Characterization of Complexes of Molybdenum with Sulfur and Nitrogen Containing Ligands written by Jeffrey Hyde (R.) and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
