CrO42− anion and a relatively stable Cr(V) complex. Consecutive biphasic kinetics through two first-order steps were observed for the base hydrolysis and the oxidation process, whereas the acid-catalyzed aquation obeys a simple first-order pattern. Based on the kinetic and spectroscopic data, mechanisms of the coordinated amino acid liberation and chromium(III) oxidation are discussed.
Kinetics and Mechanism of Acid Hydrolysis of Bis(dicarboxylato)carbonatochromate(III) Complexes
作者:C. S. T. Sai、N. R. Anipindi、V. Subbiah、M. W. Pandit
DOI:10.1246/bcsj.63.3644
日期:1990.12
acid-catalysed aquation reactions of three complexions of the general formula [Cr(XX)2(CO3)]3−, where XX=oxalate, malonate, or methylmalonate, by stopped-flow spectrophotometry in the acid range 0.1–2.0 M (M=mol dm−3) and 20–35°C at an ionic strength of 2 M. Only the ring-opening reaction of the carbonate is observed, k=2.12, 3.28, and 4.02 M−1 s−1 at 25°C respectively for oxalato, malonato, and methylmalonato
The<i>trans</i>-<i>cis</i>Isomerization of Potassium Diaquabis(oxalato)chromate(III) in Various Organic Solvent–Water Mixtures
作者:Kengo Uchida、Yoshinobu Takinami
DOI:10.1246/bcsj.54.2298
日期:1981.8
Kinetics of the trans-cisisomerization of K[Cr(ox)2(H2O)2] have been investigated in binary mixed solvents, including ethanol–, dioxane–, and acetone–water mixtures. The first-order rate constant decreases with an increase in the concentration of an organic solvent. A similar decrease by the addition of an organic solvent was observed in the presence of univalent and bivalent cations. These results
Lanthanide ion catalysis of the trans-cis isomerization of trans-bis(oxalato)-diaquochromate(III) and trans-bis(malonato)diaquochromate(III) [1]
作者:Daniel H. Huchital、Harry G. Brittain、Loreta Kiel Beutelman、Xiucen Yang
DOI:10.1016/s0020-1693(00)87608-2
日期:1984.9
the lanthanide series. The results indicates that for this portion of the series, the reaction mechanism is related to the formation of monocarboxylate complex intermediates. When the ionic radius of the lanthanide ion decreases below a particular value (as in the latter half of the series), the metal ion remains coordinated to both carboxylates of the oxalate ion rather than simply binding to only one