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Book Dithiolene Chemistry

    Dithiolene Chemistry

    Book Details:
  • Author : Edward I. Stiefel
  • Publisher : John Wiley & Sons
  • Release : 2004-01-16
  • ISBN : 0471471917
  • Pages : 752 pages

Download or read book Dithiolene Chemistry written by Edward I. Stiefel and published by John Wiley & Sons. This book was released on 2004-01-16 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Progress in Inorganic Chemistry series provides inorganic chemistry with a forum for critical, authoritative evaluations of advances in every area of the discipline. Volume 52, Dithiolene Chemistry: Synthesis, Properties, and Applications continues this forum with a focus on dithiolene chemistry and a significant, up-to-date selection of papers by internationally recognized researchers. Dithiolene complexes have a remarkable set of properties, a fact which has made them the object of intense study for new materials and sensors.

Book Dithiolene Chemistry

    Dithiolene Chemistry

    Book Details:
  • Author : Edward I. Stiefel
  • Publisher : Wiley-Interscience
  • Release : 2003-12-15
  • ISBN : 9780471378297
  • Pages : 0 pages

Download or read book Dithiolene Chemistry written by Edward I. Stiefel and published by Wiley-Interscience. This book was released on 2003-12-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Progress in Inorganic Chemistry series provides inorganic chemistry with a forum for critical, authoritative evaluations of advances in every area of the discipline. Volume 52, Dithiolene Chemistry: Synthesis, Properties, and Applications continues this forum with a focus on dithiolene chemistry and a significant, up-to-date selection of papers by internationally recognized researchers. Dithiolene complexes have a remarkable set of properties, a fact which has made them the object of intense study for new materials and sensors.

Book Synthesis and Characterization of Monomeric and Dimeric Complexes of Molybdenum and Tungsten Containing Metal ligand Multiple Bonds

Download or read book Synthesis and Characterization of Monomeric and Dimeric Complexes of Molybdenum and Tungsten Containing Metal ligand Multiple Bonds written by Keith Anthony Hall and published by . This book was released on 1993 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis Reactivity and Electronic Structure of Molybdenum and Tungsten Complexes

Download or read book Synthesis Reactivity and Electronic Structure of Molybdenum and Tungsten Complexes written by Kristine Quinlan and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2002 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Reactivity of Molybdenum and Tungsten Alkylidyne Complexes

Download or read book Synthesis and Reactivity of Molybdenum and Tungsten Alkylidyne Complexes written by Laughlin G. McCullough and published by . This book was released on 1984 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Synthesis and Studies of Mo and W Complexes for 2N Reduction

Download or read book Synthesis and Studies of Mo and W Complexes for 2N Reduction written by Jia Min Chin and published by . This book was released on 2010 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of monopyrroletriamine ligands [Arpyr(Ar')2]H3 of the form ArC4H2NHCH2N(CH2CH2NHAr')2 (Ar = 2,4,6-mesityl (Mes), 2,4,6-triisopropylphenyl (TRIP); Ar' = C6F5, 2-tolyl (o-tol), naphthyl, 3,5-(2,4,6-triisopropylphenyl)phenyl (HIPT), 3,5- dimethylphenyl, 3,5-di-tert-butylphenyl were synthesized. [Mespyr(C6F5)2]MoCl, ([Mespyr(C6F5)2]Mo = MesitylC4H2NCH2N(CH2CH2NC6F5)2) was prepared by reaction of [Mespyr(C6F5)2]H3 with MoCl4(THF)2 and base and [Mespyr(3,5-t-Bu)2]MoCl and [Mespyr(3,5- Me)2]MoCl (3,5-t-Bu=3,5-di-tert-butylphenyl, Me = 3,5-dimethylphenyl) were synthesized likewise. All three monochlorides are paramagnetic. [Mespyr(C6F5)2]MoNMe2, [[Mespyr(otol) 2]MoNMe2, [Mespyr(3,5-t-Bu)2]MoNMe2, [Mespyr(3,5-Me)2]MoNMe2 were synthesized by reaction of the ligands with Mo(NMe2)4. The resulting compounds are diamagnetic and range in color from teal blue to emerald green. These low spin monodimethylamide complexes exist in rapid equilibria with their high spin forms. [Mespyr(C6F5)2]MoN and [Mespyr(3,5-t-Bu)2]MoN were synthesized by reaction of their respective monochlorides with NaN3 and are yellow diamagnetic species. Reaction of [Mespyr(3,5-t-Bu)2]MoN with Et3OBF4 leads to {[Mespyr(3,5- t-Bu)2]MoNEt}BF4, also a diamagnetic yellow species. [Mespyr(C6F5)2]MoOTf is synthesized by the reaction of [Mespyr(C6F5)2]MoCl with AgOTf. Reduction of [Mespyr(3,5-t-Bu)2]MoCl with Na under N2 led to [Mespyr(3,5-t-Bu)2]MoNNNa(THF)x, several species with varying numbers of THF coordination, x. A single species can be obtained when [Mespyr(3,5-t- Bu)2]MoNNNa(THF)x is reacted with either NBu4Cl or 15-crown-5 ether to yield purple green 4 {[Mespyr(3,5-t-Bu)2]MoNN}NBu4 or [Mespyr(3,5-t-Bu)2]MoNNNa(15-c-5). All the diazenide species are diamagnetic. Oxidation of the diazenide with AgOTf yields [Mespyr(3,5-t- Bu)2]Mo(N2). [Mespyr(3,5-t-Bu)2]Mo(CO) is synthesized by exposure of [Mespyr(3,5-t- Bu)2]Mo(N2) to CO. Reaction of [Mespyr(3,5-t-Bu)2]MoCl with NaBPh4 and NH3 yields {[Mespyr(3,5-t-Bu)2]Mo(NH3)}BPh4. Catalytic runs employing [Mespyr(3,5-t-Bu)2]MoN as the catalyst yielded one equivalent of NH3. A triamidoamine ligand [(HIPTNCH2CH2CH2)3N]3- was synthesized and metalated with MoCl4(THF)2 to produce [(HIPTNCH2CH2CH2)3N]MoCl ([HIPTtrpn]MoCl). Reduction of [HIPTtrpn]MoCl by KC8 under an atmosphere of dinitrogen leads to the green species [HIPTtrpn]MoNNK which can be oxidized by ZnCl2(dioxane) to produce [HIPTtrpn]Mo(N2). Other complexes synthesized include {[HIPTtrpn]Mo(NH3)}+ salts and [HIPTtrpn]Mo(CO). Xray studies were carried out on [HIPTtrpn]MoN and {[HIPTtrpn]Mo(NH3)}BAr'4. This system is not catalytic for the reduction of dinitrogen to ammonia and studies were carried out to elucidate the reasons. Oxidation studies were carried out on [HIPTN3N]Mo(N2) and [HIPTN3N]W(N2) ([HIPTN3N] = [(HIPTNCH2CH2)3N]3- ). The rate of conversion of [HIPTN3N]Mo(NH3) to [HIPTN3N]Mo(N2) was studied and found to be increased in the presence of BPh3. [HIPTN3N]Mo(N2) conversion to [HIPTN3N]Mo(CO) was found to be dependent on CO pressure. Protonation studies of [HIPTN3N]Mo(N2) were also carried out. Studies of [HIPTN3N]MoNNH decomposition showed that decomposition is not base-catalyzed. [HIPTN3N]W(CO) was synthesized by exposure of [HIPTN3N]W(N2) to CO. It is a green, paramagnetic compound and its use as a standard (for determining relative concentrations of other compounds in the IR sample) in IR spectroscopic studies appears to be promising. [HIPTN3N]MoCNH2 was synthesized by addition of acid and reducing agent to [HIPTN3N]MoCN and is a yellow, diamagnetic compound. Two triamidophosphine ligands, triHIPTamine and tri-n-Buamine were synthesized. Metalation of Zr(NMe2)4 with these ligands leads to formation of pn3HIPTZrNMe2 and pn3-n- BuZrNMe2, both diamagnetic, pale yellow complexes.

Book Synthesis Characterization and Reactivity of Molybdenum and Tungsten Imido Complexes of Relevance to Alkene Dimerization

Download or read book Synthesis Characterization and Reactivity of Molybdenum and Tungsten Imido Complexes of Relevance to Alkene Dimerization written by William R. H. Wright and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Molybdenum and Tungsten Enzymes

Download or read book Molybdenum and Tungsten Enzymes written by Russ Hille and published by Royal Society of Chemistry. This book was released on 2016-10-10 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been enormous progress in our understanding of molybdenum and tungsten enzymes and relevant inorganic complexes of molybdenum and tungsten over the past twenty years. This set of three books provides a timely and comprehensive overview of the field and documents the latest research. Building on the first volume that focussed on biochemistry aspects, the second volume in the set focusses on the inorganic complexes that model the structures and reactivity of the active sites of each major group of molybdenum and tungsten enzymes. Special attention is given to synthetic strategies, reaction mechanism and chemical kinetics of these systems. The introductory chapter provides a useful overview and places the topic of the book into a wider context. This text will be a valuable reference to workers both inside and outside the field, including graduate students and young investigators interested in developing new research programs in this area.

Book Molybdenum and Tungsten Metal Organic Decomposition Complex Synthesis and Characterization

Download or read book Molybdenum and Tungsten Metal Organic Decomposition Complex Synthesis and Characterization written by Kaitlyn Clark and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Synthesis and characterization of silver, molybdenum and tungsten metal organic decomposition complexes is reported. Molybdenum and tungsten are of interest, in order to expand 3D printing capabilities, by providing precursors capable of forming metal structures with superior chemical and mechanical properties. In addition to using known synthetic pathways using silver precursors, molybdenum hexacarbonyl, tungsten hexacarbonyl were reacted with three ligands: ethylenediamine, diethylenetriamine, and triethylamine to develop MOD complexes. The MOD products were characterized by NMR, FTIR and thermogravimetric (TGA) analysis. Thermal decomposition mechanisms were studied by TGA. Whereas the silver MOD complexes were found to decompose to metallic silver at temperatures lower than 200°C in both inert and atmospheric conditions, the molybdenum diethylenetriamine complex and the molybdenum triethylamine complex decomposed to molybdenum metal, and only in inert conditions at temperatures well in excess of 200°C. The other molybdenum complex, as well as all of the tungsten complexes decomposed to their oxide forms at temperatures greater than 600°C in inert and atmospheric conditions. Triethylamine-tungsten complex was found to sublime at 110°C. A hard-soft acid-base theoretical analysis indicates that, as opposed to the silver complexes where electron density is more localized on the metal center, electron density is withdrawn from the metal centers in the case of molybdenum and tungsten complexes. Additional stability provided by carbonyl p-backbonding for the carbonyl ligands prevented low temperature decomposition. As a result, this work shows that molybdenum and tungsten hexacarbonyls are not suitable starting materials for creating MOD complexes when one or more of the carbonyl groups remain on the complex. The complexes may, however, be used for metal oxide deposition instead of metal deposition."--Abstract.