Download or read book Hydrolysis and Decomposition of Chromium III and Cobalt III Complexes of Adenosine 5 triphosphate written by Samuel Hoge McClaugherty and published by . This book was released on 1981 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Cobalt III Complexes on the Rate of Hydrolysis of ATP written by Gene R. Meyer and published by . This book was released on 1983 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrolysis Reactions of Some Fluorotetramine Chromium III Complexes written by Mahmoud Delavar and published by . This book was released on 1976 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the study was to investigate the kinetics and mechanisms of the replacement of fluoro-ligand from a series of complexes in aqueous acidic solutions. The compounds studied were all octahedral complexes of chromium (III) or cobalt (III). The kinetic runs were studied by a spectrophotometric method and by direct estimation of free fluoride ion concentrations. All reactions were first order in complex ion concentration. The rate constants were all acidity function dependent. In no case was a maximum rate constant observed, even at very high acid concentrations. For some of the complexes rapid reversible changes of the visible and ultraviolet spectra are observed when the solutions are alternately carefully acidified and diluted. These spectral changes may be attributed to a rapid reversible protonation of the fluoro-ligand. The apparent ionisation ratios of the protonated species have been evaluated. The initial product of the hydrolysis reactions is the corresponding aquo (or aquofluoro) complex. For some of the compounds studied the aquofluoro species have been isolated for the first time. At later times some of the aquo-fluoro-species are anated by e.g. nitric or sulphuric acid. The kinetic results have been analysed according to the postulates of Zucker and Hammett and of Bunnett and of Bunnett and Olsen. The chromium complexes all appear to react via a mechanism in which water is involved as a proton transfer agent. In the case of a cobalt complex the water molecule is involved as a nucleophile. The reactions do not exhibit general acid catalysis but fluoro species (e.g. HF 2-, HF or F-) do catalyse the replacement of the fluoro-ligand. This catalysis is attributed to the unusual properties of hydrogen fluoride.
Download or read book A Study of the Thermal Decomposition of Some Chromium III and Cobalt III Ammine Complexes written by John LaRue Bear and published by . This book was released on 1960 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Preparation Characterization and Chromium II Reduction of Pentaamminecobalt III written by Robert J. Balahura and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chromium(II) reduction of a series of pentaammine- cobalt(III) complexes has been studied. A classification into inner- or outer-sphere paths has been made and the position of attack of the reductant on the ligand determined. The oxygen-bonded complexes of formamide, N,N-dimethylform- amide, dimethylsulfoxide, and urea as well as the nitrogen bonded N-cyanoguanidine complex are reduced by means of an outer-sphere mechanism. On the other hand ligand transfer was shown to occur in the reduction of (NH[subscript 3])[subscript 5]CoNHCHO[superscript 2+], (NH[subscript 3])[subscript 5]CoNCNH[superscript 2+], (NH[subscript 3])[subscript 5]CoO[subscript 2]CNH[subscript 2][superscript 2+], (NH[subscript 3])[subscript 5]CoO[subscript 2]CC[subscript 6]H[subscript 4]CN[superscript 2+], and (NH[subscript 3])[subscript 5]CoNCO[superscript 2+]. Both outer- and inner-sphere paths operate in the reduction of the nitrile bonded 4-cyanophenol complex, the inner-sphere path comprising 20% of the overall reaction. For the reduction of the terephthalonitrile complex a classification into an inner- or outer-sphere path cannot be made/ and an outer-sphere electron transfer to the ligand is postulated as the rate-determining step. A large part of the work has been concerned with the characterization of the complexes and Chapter III describes the spectroscopic measurements undertaken as well as the chemical reactions of some of the complexes. The acid dissociation constant of the N isomer of formamidopentaamine- cobalt(III), cyanamidopentaamminecobalt(III), and the nitrile bonded 4-cyanophenol have been determined. The protonation equilibrium constant for carbamatopentaammine- cobalt(III) was also obtained. A kinetic study of the acid hydrolysis of isocyanatopentaamminecobalt(III) to form hexaamminecobalt(III) and carbon dioxide was carried out. The acylation of the cyanamide and 4-cyanophenol complexes was also studied. The results of the kinetic studies of the chromium(II) reductions indicate a possible correlation between the reduction rate and the half-wave potential for the reduction of the free ligand. The studies have led to the following generalizations regarding electron transfer reactions: (1) attack of reductant at a coordinated atom does not occur, (2) the atom attached to chromium(II) in the transition state must have two lone pairs of electrons, and (3) the reducibility of the complexed ligand plays an important role in the detailed mechanism for the transfer of the electron.
Download or read book Mechanism of Base Hydrolysis of Some Cobalt III Complexes written by Robert Eldon Meeker and published by . This book was released on 1956 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1983 with total page 1294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Indian Journal of Chemistry written by and published by . This book was released on 1994 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1973 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACS Style Guide written by Anne M. Coghill and published by American Chemical Society. This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the time since the second edition of The ACS Style Guide was published, the rapid growth of electronic communication has dramatically changed the scientific, technical, and medical (STM) publication world. This dynamic mode of dissemination is enabling scientists, engineers, and medicalpractitioners all over the world to obtain and transmit information quickly and easily. An essential constant in this changing environment is the requirement that information remain accurate, clear, unambiguous, and ethically sound.This extensive revision of The ACS Style Guide thoroughly examines electronic tools now available to assist STM writers in preparing manuscripts and communicating with publishers. Valuable updates include discussions of markup languages, citation of electronic sources, online submission ofmanuscripts, and preparation of figures, tables, and structures. In keeping current with the changing environment, this edition also contains references to many resources on the internet.With this wealth of new information, The ACS Style Guide's Third Edition continues its long tradition of providing invaluable insight on ethics in scientific communication, the editorial process, copyright, conventions in chemistry, grammar, punctuation, spelling, and writing style for any STMauthor, reviewer, or editor. The Third Edition is the definitive source for all information needed to write, review, submit, and edit scholarly and scientific manuscripts.
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pandex Current Index to Scientific and Technical Literature written by and published by . This book was released on 1970 with total page 1404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the American Chemical Society written by American Chemical Society and published by . This book was released on 1974 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Society are included in v. 1-59, 1879-1937.
Download or read book Biochemistry written by David E. Metzler and published by Elsevier. This book was released on 2003-05-04 with total page 1063 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemistry: The Chemical Reactions of Living Cells is a well-integrated, up-to-date reference for basic chemistry and underlying biological phenomena. Biochemistry is a comprehensive account of the chemical basis of life, describing the amazingly complex structures of the compounds that make up cells, the forces that hold them together, and the chemical reactions that allow for recognition, signaling, and movement. This book contains information on the human body, its genome, and the action of muscles, eyes, and the brain. * Thousands of literature references provide introduction to current research as well as historical background * Contains twice the number of chapters of the first edition * Each chapter contains boxes of information on topics of general interest
Download or read book Polymers for Biomedical Applications written by Anil Mahapatro and published by American Chemical Society. This book was released on 2008-04-17 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on applications of polymers for biomedical applications has increased dramatically to find improved medical plastics for this rapidly evolving field. This book brings together various aspects of recent research and developments within academia and industry related to polymers for biomedical applications.
Download or read book Natural Attenuation for Groundwater Remediation written by Commission on Geosciences, Environment, and Resources and published by National Academies Press. This book was released on 2000-08-31 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past decade, officials responsible for clean-up of contaminated groundwater have increasingly turned to natural attenuation-essentially allowing naturally occurring processes to reduce the toxic potential of contaminants-versus engineered solutions. This saves both money and headaches. To the people in surrounding communities, though, it can appear that clean-up officials are simply walking away from contaminated sites. When is natural attenuation the appropriate approach to a clean-up? This book presents the consensus of a diverse committee, informed by the views of researchers, regulators, and community activists. The committee reviews the likely effectiveness of natural attenuation with different classes of contaminants-and describes how to evaluate the "footprints" of natural attenuation at a site to determine whether natural processes will provide adequate clean-up. Included are recommendations for regulatory change. The committee emphasizes the importance of the public's belief and attitudes toward remediation and provides guidance on involving community stakeholders throughout the clean-up process. The book explores how contamination occurs, explaining concepts and terms, and includes case studies from the Hanford nuclear site, military bases, as well as other sites. It provides historical background and important data on clean-up processes and goes on to offer critical reviews of 14 published protocols for evaluating natural attenuation.
Download or read book Transition Metal Dinitrogen Complexes written by Yoshiaki Nishibayashi and published by John Wiley & Sons. This book was released on 2019-05-06 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive book that explores nitrogen fixation by using transition metal-dinitrogen complexes Nitrogen fixation is one of the most prominent fields of research in chemistry. This book puts the focus on the development of catalytic ammonia formation from nitrogen gas under ambient reaction conditions that has been recently repowered by some research groups. With contributions from noted experts in the field, Transition Metal-Dinitrogen Complexes offers an important guide and comprehensive resource to the most recent research and developments on the topic of nitrogen fixation by using transition metal-dinitrogen. The book is filled with the information needed to understand the synthesis of transition metal-dinitrogen complexes and their reactivity. This important book: -Offers a resource for understanding nitrogen fixation chemistry that is essential for explosives, pharmaceuticals, dyes, and all forms of life -Includes the information needed for anyone interested in the field of nitrogen fixation by using transition metal-dinitrogen complexes -Contains state-of-the-art research on synthesis of transition metal-dinitrogen complexes and their reactivity in nitrogen fixation -Incorporates contributions from well-known specialists and experts with an editor who is an innovator in the field of dinitrogen chemistry Written for chemists and scientists with an interest in nitrogen fixation, Transition Metal-Dinitrogen Complexes is a must-have resource to the burgeoning field of nitrogen fixation by using transition metal-dinitrogen complexes.
