Download or read book Hydrolysis Reactions of Fluorohalo and Fluoroaguo Complexes of Bis 1 3 diaminopropane Chromium III and Bis ethylenediamine Chromium III written by James M. DeJovine and published by . This book was released on 1974 with total page 330 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 Synthesis and Characterization of Some Fluoroacidobis 1 2 propanediamine Chromium III Complexes and Dihalobis 1 2 propanediamine Chromium III Complexes written by Larry N. Coward and published by . This book was released on 1973 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrolysis of Cis difluorobus ethylene diamine Chromium III Cation written by Klaus Rudolf Arymund Fehrmann and published by . This book was released on 1960 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of the Dimeric Chromium III Complex Di Hydroxobis N N bis 2 pyridylmethyl 1 3 propanediamine chromium III Perchlorate bispictn Cr OH 2 ClO4 4 3H2O written by and published by . This book was released on 1984 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
