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Title: Effect of solvent on reactions of coordination complexes: Part 11†―Kinetics of solvolysis of cis-(chloro) (cyclohexylamine) bis(ethylenediamine) cobalt (III) in acetone + water media
Authors: Dash, Anadi C
Pradhan, Jyotsnamayee
Issue Date: Feb-1990
Publisher: NISCAIR-CSIR, India
Abstract: The kinetics of solvolysis of cis-(chloro)(cyclohexyl-amine)bis(ethylenediamine) cobalt (III) ion have been investigated in acetone + water (0-50 wt% acetone) in the temperature range of 35-50°C. The plots of log k versus the reciprocal of the bulk dielectric constant (Ds-l) of the mixed solvent and log k versus solvent ‘Yt-Bucl' parameter were nonlinear. The plots of log k versus Xorg (Xorg = mol fraction of acetone) at 35 ≤ tᵒ, C ≤ 50 are strikingly linear with the common gradient = - 3.14 ± 0.10. These facts are in keeping with the importance of the solvent structural effects and the lack of appreciable preferential solvation of the substrate under the conditions of rate measurements. It is striking to note that unlike for the alcohol-water solvent systems and a variety of cobalt (III) substrates, H(and S) solvent composition profile in the present case, displaying a weak maximum at XMe2CO  0.01 is little sensitive to the medium beyond XMe2CO  0.05.
Page(s): 167-170
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.29A(02) [February 1990]

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