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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:
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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)
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:
Author : Tina Pui Wah Fong
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
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.).
Author : TINA PUI WAH. FONG
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (978 download)
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:
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 : Sandra E. Trentowsky
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
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.
Author : Maurizio Peruzzini
Publisher : Elsevier
ISBN 13 : 0080540333
Total Pages : 577 pages
Book Rating : 4.0/5 (85 download)
Download or read book Recent Advances in Hydride Chemistry written by Maurizio Peruzzini and published by Elsevier. This book was released on 2002-01-30 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been conceived to collect the most important recent advances in all areas of hydride chemistry research, including chemical reactivity, instrumental investigation, theory, and applications in the areas of catalysis, biochemistry and materials science. Many of the chapters have been written by the plenary lecturers of the EURO-Hydrides 2000 conference, but other leading scientists in this field have also been invited to contribute. The first part of the book focuses on the chemistry and catalysis of transition metal hydrides. Another block of chapters illustrates the most recent advances in the application of instrumental techniques to the study of the properties and reactivity of hydride compounds. The final part of the book illustrates the relevance of metal-hydrogen bonds in biochemistry and materials science. All of the chapters of this book have been evaluated by independent reviewers.
Author : Caroline Theresia Schweitzer
Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (219 download)
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:
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ISBN 13 :
Total Pages : 884 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wade H. Shafer
Publisher : Springer Science & Business Media
ISBN 13 : 1461559693
Total Pages : 341 pages
Book Rating : 4.4/5 (615 download)
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this jOint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 40 (thesis year 1995) a total of 10,746 thesis titles from 19 Canadian and 144 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 40 reports theses submitted in 1995, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Author : Th. Weber
Publisher : Springer Science & Business Media
ISBN 13 : 9401735778
Total Pages : 357 pages
Book Rating : 4.4/5 (17 download)
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.
Author : Martin H. G. Prechtl
Publisher :
ISBN 13 : 9783865532299
Total Pages : 152 pages
Book Rating : 4.5/5 (322 download)
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:
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ISBN 13 :
Total Pages : 816 pages
Book Rating : 4.3/5 (91 download)
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2000 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gregory J. Kubas
Publisher : Springer Science & Business Media
ISBN 13 : 0306475979
Total Pages : 479 pages
Book Rating : 4.3/5 (64 download)
Download or read book Metal Dihydrogen and σ-Bond Complexes written by Gregory J. Kubas and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to R.H. Crabtree, Metal Dihydrogen and sigma-Bond Complexes is described as `the definitive account of twentieth-century work in the area of sigma complexation'. It covers not only Kubas' discovery of dihydrogen coordination and the study of its structure and general properties but also discusses both the theoretical beliefs and experimental results of bonding and activation of dihydrogen on metal centers and the coordination and activation of C-H, B-H, X-H, and X-Y bonds, giving an overview of `one of the hottest areas in chemistry'.
Author : Fei Chen
Publisher :
ISBN 13 :
Total Pages : 271 pages
Book Rating : 4.:/5 (223 download)
Download or read book Structural Studies of Complexes of Ruthenium and Osmium with Fullerenes, Dinitrogen and Dihydrogen written by Fei Chen and published by . This book was released on 2002 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Guochen Jia
Publisher :
ISBN 13 :
Total Pages : 698 pages
Book Rating : 4.:/5 (28 download)
Download or read book Synthesis and Reactivity of Ruthenium Hydride Complexes Containing Chelating Triphosphines and Studies on Ruthenium Chloride, Acetate and Carbonyl Complexes Containing Chelating Triphosphines written by Guochen Jia and published by . This book was released on 1989 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Samuel Colville Lind
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (392 download)
Download or read book An Investigation of Some Compounds of Ruthenium written by Samuel Colville Lind and published by . This book was released on 1902 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
