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Investigation Of Some Acidic Ruthenium Dihydrogen And Hydride Complexes Microform
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Author :Tina Pui Wah Fong Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612411548 Total Pages :402 pages Book Rating :4.4/5 (115 download)
Book Synopsis Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes [microform] by : Tina Pui Wah Fong
Download or read book Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes [microform] written by Tina Pui Wah Fong and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes by :
Download or read book Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes by : Tina Pui Wah Fong
Download or read book Investigation of Some Acidic Ruthenium Dihydrogen and Hydride Complexes written by Tina Pui Wah Fong and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reaction of Cp*Ru(dfepe)Cl (1) in dry CH2Cl 2 at -78°C with H2 (g) and AgOTf produced a mixture of Cp*Ru(dfepe)H (2) and [Cp*Ru(dfepe)(H)2] + as shown by 1H NMR spectroscopy. The addition of excess HOW to the mixture of monohydride and dihydride under H2 (g) gave only the dihydride. X-ray diffraction studies of the dfepe complexes 1 and 2 revealed close contacts between the fluorine atoms of the dfepe ligand and the hydrogen atoms on the methyl groups of the Cp* ligand. Cyclic voltammetry studies, were carried out on 1 and 2 and the redox potentials were found to be quite positive. The EL value of 1/2 dfepe was found to be 0.89 V (NIHE), similar to CO. From the X-ray diffraction study, the complex Cp*Ru(tmbp)H (6) has a distorted three-legged piano stool structure and the tmbp ligand is relatively planar. The 'E'L value of 1/2 tmbp was found to be 0.52 V (NHE), similar to dppm. The hydrido cyano ruthenium (II) complexes 'trans'-[RuH(CN)(L) 2] (L = dppe or depe) were protonated with one equivalent of acid to produce 'trans'-[RuH(CNH)(dppe)2](OTf) (12 ) and 'trans'-[Ru([eta]2-H2)(CN)(depe) 2](BF4) (21). The addition of a second equivalent of acid to complex 12 produced the dihydrogen Complex ' trans'-RU([eta]2-H2)(CN)(dPPe)2](TfO···HOTf) (15). The highly acidic dicationic dihydrogen complex, ' trans'-[Ru([eta]2-H2)CNH(dppe)2](TfO···HOTf) 2 (13), was observed when two equivalents of acid was added to complex 15. Complex 13 was deprotonated by El 2O, reforming complex 15. Complex 15 was unstable and readily lost H2 under Ar forming 'trans'-[Ru(OTf)(CNH)(dppe) 2](OTf) (14). When complex 14 was placed under H2 gas, complex 15 reformed. This is a rare example of the formation of an acidic dihydrogen complex from H2 gas. Both dihydrogen complexes 13 and 15 have H-H distances of 0.88 Å which were determined from 1'J'(HD) values (32.4 Hz and 32.0 Hz, respectively). Another example of the formation of an acidic dihydrogen complex from H2 gas is the formation of the termally unstable complex ' trans'-[Ru([eta]2-H2)(CN)(dppe)2](OTf) (18) from 'trans'-[Ru(OTf)(CN)(dppe)2] (17). The dihydrogen complex rearranges to the thermodynamically stable complex 12 at room temperature. The Inelastic Neutron Scattering (INS) study of 'trans'-[Ru([eta] 2-H2)H(dppe)2][BPh4] revealed weak [pi]-backbonding from the Ru centre to the dihydrogen ligand. The room temperature solution 2H NMR spectrum revealed that 'trans'-[Ru([eta] 2-D2)Cl(dppe)2]PF6 (22) readily undergoes H/D exchange with the dppe ligands. From the variable temperature solid state 2H NMR spectra of 22, the coherent tunneling frequency of the deuterons of the dideuterium ligand was observed to be 60.8 kHz. (Abstract shortened by UMI.).
Book Synopsis Synthesis and Reactivity of Some Acidic Ruthenium Dihydrogen by : TINA PUI WAH. FONG
Download or read book Synthesis and Reactivity of Some Acidic Ruthenium Dihydrogen written by TINA PUI WAH. FONG and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Investigation of Some Cationic and Neutral Ruthenium Dihydrogen and Hydride Complexes by :
Download or read book Synthesis and Investigation of Some Cationic and Neutral Ruthenium Dihydrogen and Hydride Complexes written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Shaun Errick Landau Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612459281 Total Pages : pages Book Rating :4.4/5 (592 download)
Book Synopsis Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes [microform]: Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III) by : Shaun Errick Landau
Download or read book Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes [microform]: Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III) written by Shaun Errick Landau and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Investigation of Some Cationic and Neutral Ruthenium Dihydrogen and Hydride Complexes by : Sandra E. Trentowsky
Download or read book Synthesis and Investigation of Some Cationic and Neutral Ruthenium Dihydrogen and Hydride Complexes written by Sandra E. Trentowsky and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reversible binding of dihydrogen gas on [Ru([eta]2-H 2)H(dppe)2]+ [X]-, where X- = BPh4, B(Arf)4, BF4, PF6 was investigated using 31P and 13C solid state NMR spectroscopy. X-ray crystal structure analysis of the new species [RuH(dppe)2]+ [BPh4] -, [Ru([eta]2-H2)H(dppe)2] + [B(Arf)4]- and [RuCl(dppe) 2]+ [B(Arf)4]- was carried out. As well a comparison of the structure of [RuH(dppe)2]+ [BPh4]- with that of [Ru([eta]2-H2)H(dppe) 2]+ [BPh4]- showed that minor structural changes occur upon loss of the dihydrogen ligand. The activation of X-H bonds, where X = Si, C, S and O, by reaction with Ru(OTf)(CN)(dppe)2 which contains a highly labile triflate ligand was studied. Many new cationic Ru(II) complexes were prepared and characterized. The X-ray crystal structure of [Ru(CCPh)(CN)(dppe)2] + [OTf]- was determined. Finally, the catalyst precursor RuHCl(PPh3)3 was used to carry out various substitution reactions aimed at determining if the method developed to prepare RuHCl(PPh3)(R-BINAP) could be applied as a general method for the preparation of other complexes containing other chiral and non chiral chelating phosphines. These five coordinate complexes could then be further tested for their ability to act as catalysts in the hydrogenation of ketones and imines.
Book Synopsis Dihydrogen and Hydride Complexes of Ruthenium(II): Synthesis and Properties by : Caroline Theresia Schweitzer
Download or read book Dihydrogen and Hydride Complexes of Ruthenium(II): Synthesis and Properties written by Caroline Theresia Schweitzer and published by . This book was released on 1993 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Formation and Reactions of a Hydroxycyclopentadienyl Ruthenium Hydride by : Steven William Singer
Download or read book Formation and Reactions of a Hydroxycyclopentadienyl Ruthenium Hydride written by Steven William Singer and published by . This book was released on 2001 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes, Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III). by :
Download or read book Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes, Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III). written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Joseph M. Kahenya Publisher :Library and Archives Canada = Bibliothèque et Archives Canada ISBN 13 :9780612942028 Total Pages :470 pages Book Rating :4.9/5 (42 download)
Book Synopsis An Investigation of Hole-transfer and Antiferromagnetic Superexchange in Asymmetric Dinuclear Ruthenium Complexes [microform] by : Joseph M. Kahenya
Download or read book An Investigation of Hole-transfer and Antiferromagnetic Superexchange in Asymmetric Dinuclear Ruthenium Complexes [microform] written by Joseph M. Kahenya and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes, Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III). by : Shaun Errick Landau
Download or read book Pushing the Limits of Acidity and Basicity of Transition Metal Hydride Complexes, Studies of Acidic Dicationic Dihydrogen Complexes of Iron (II) and Basic Anionic Hydride Complexes of Iridium (III). written by Shaun Errick Landau and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: ['Trans'-Fe(H2)(CO)(dppe)2]2+ (pKa -5) was generated by protonation while [' trans'-Fe(H2)(CO)(depe)2]2+ (pK a -2) was generated using molecular H2. These complexes were characterized in solution but were not isolated. ['Trans'-Fe(BF 4)(CO)(depe)2][BF4] and ['Trans'-Fe(OTf)(CO)(depe) 2][OTf] were isolated and characterized. ['Trans'-FeF(CO)(depe) 2]+ was generated from ['trans'-Fe(BF 4)(CO)(depe)2]+ and characterized in solution but was not isolated. The compounds [K('Q')][IrH4(PR3) 2] ('Q' = 18-crown-6, R = Ph, iPr, Cy; ' Q' = aza-18-crown-6, R = iPr; 'Q' = diaza-18-crown-6, R = Ph, iPr, Cy) were formed in the reactions of IrH5(PR3)2 with KH and 'Q'. The PCy3 compounds were not isolated. In solution [IrH4(PR 3)2]- (R = Ph, Cy) are 'cis' but [IrH4(P'i'Pr3)2] - is a mixture of 'cis' and 'trans' isomers. There is evidence of solution proton-hydride bonding of the aza salts. In the solid state the anion in [K(18-crown-6)][IrH4(Pi Pr3)2] is 'cis' but it is ' trans' in [K(diaza-18-crown-6)][IrH4(PiPr3)2]. [K(diaza-18-crown-6)][IrH4(PR3)2] (R =Ph, iPr) form solid-state chains linked by proton-hydride bonds.
Book Synopsis Novel Ruthenium Dihydrogen Complexes and Their Application in Catalysis by : Martin H. G. Prechtl
Download or read book Novel Ruthenium Dihydrogen Complexes and Their Application in Catalysis written by Martin H. G. Prechtl and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Joshi Kuncheria Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612285033 Total Pages :376 pages Book Rating :4.2/5 (85 download)
Book Synopsis Chemistry of a Binuclear Ruthenium(0) Complex [microform] by : Joshi Kuncheria
Download or read book Chemistry of a Binuclear Ruthenium(0) Complex [microform] written by Joshi Kuncheria and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1. {\it Introduction\/}. This chapter represents an effort to pull together a coherent collection of contemporary ideas and research advances within a field of organometallic chemistry of diruthenium complexes that are bridged by diphosphorus ligands.
Download or read book Gold Chemistry written by Fabian Mohr and published by John Wiley & Sons. This book was released on 2009-04-20 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by world-class authors, this most recent major book on the topic highlights new and current trends as well as future directions. It is comprehensive in its scope, covering all aspects of gold chemistry -- from homogeneous to heterogeneous catalysis, from supramolecular assemblies to sensors and medicinal applications. The result is an invaluable work for both organic and inorganic chemists working in universities and industry, as well as material scientists.
Book Synopsis Modern Reduction Methods by : Pher G. Andersson
Download or read book Modern Reduction Methods written by Pher G. Andersson and published by John Wiley & Sons. This book was released on 2008-09-08 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its comprehensive overview of modern reduction methods, this book features high quality contributions allowing readers to find reliable solutions quickly and easily. The monograph treats the reduction of carbonyles, alkenes, imines and alkynes, as well as reductive aminations and cross and heck couplings, before finishing off with sections on kinetic resolutions and hydrogenolysis. An indispensable lab companion for every chemist.
Book Synopsis Quaternary Stereocenters by : Jens Christoffers
Download or read book Quaternary Stereocenters written by Jens Christoffers and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap in the literature, this book presents everything there is to know about this topic. By comprehensively covering the quaternary stereocenters found in a range of important and useful molecules in pharmaceutical and medicinal applications, as well as in thousands of natural products, the book provides the know-how chemists need to synthesize challenging molecules with numerous applications. A must for organic chemists in academia, the pharmaceutical industry and medicine. From the Contents: Important Natural Products Important Pharmaceuticals and Intermediates Aldol Reactions Michael Reactions and Conjugate Additions Cycloaddition Reactions Rearrangement Reactions Alkylation of Ketones and Imines Asymmetric Allylic Alkylation Asymmetric Cross Coupling and Heck Reactions Phase Transfer Catalysis Enzymatic Methods Radical Reactions
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