Mixed valence complexes incorporating RuIII and FeII: synthesis, characterization, kinetics and physico-chemical studies
作者:Amitava Das、H.C. Bajaj
DOI:10.1016/s0277-5387(96)00415-9
日期:1997.1
valence complexes of the type Na3[(edtaH)RuIIILFeII(CN)5], where L pyz, bp, dmbp, etybp or tmbp, has been synthesized and characterized by physico-chemical methods. The kinetics of formation of these binuclearcomplexes were studied using a stopped-flow spectrophotometer. Electrochemical studies for these complexes show only a weak metal-metal interaction in the ground state. All these complexes, except
Electron-transfer reactions in [Ru(edta)(pyz)]<sup>–</sup>(edta = ethylenedinitrilotetraacetate, pyz = pyrazine)
作者:Debabrata Chatterjee
DOI:10.1039/dt9960004389
日期:——
The kinetics of reduction of [Ru-III(edta)(pyz)](-)(edta = ethylenedinitrilotetraacetate, pyz = pyrazine) with L-ascorbic acid (H(2)A) and catechol (H(2)cat) was studied spectrophotometrically as a function of [H(2)A] or [H(2)cat], pH, ionic strength and temperature (25-45 degrees C). The reduction was found to be first order in both the complex and reductant concentrations. The pH dependence of the process(for H(2)A) was ascribed to the deprotonation of H(2)A. Kinetic data and activation parameters are interpreted in terms of a mechanism involving outer-sphere electron transfer.