Octahedral cobalt(III) complexes of the chloropentammine type. Part I. The release of chloride ions from the cis-chlorohydroxylaminebis-(ethylenediamine)cobalt(III) cation in neutral and in basic solutions
- 1 January 1966
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 126-129
- https://doi.org/10.1039/j19660000126
Abstract
The second-order rate constants for the hydrolysis of cis-chlorohydroxylaminebis(ethylenediamine)cobalt(III) cation by bases have been measured at 0° and ionic strength of 0·1M. The lower rate than of the cis-chloroammine complex is inconsistent with the SN1CB mechanism, but supports a bimolecular rearrangement between the solvation shell and the co-ordination shell. It is suggested that ion-pair association is involved in the reaction. In neutral solutions the complex cation spontaneously releases chloride ions by a redox process at rates which are much lower than those of hydrolysis by base.Keywords
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