ScienceAsia 4 (1978): 052-057 |doi: 10.2306/scienceasia1513-1874.1978.04.052

THE VOLUME OF ACTIVATION FOR AQUATION OF TRANS-CHLOROBIS-(DIMETHYLGLYOXIMATO) UREACOBALT (III) FROM HIGH PRESSURE SOLUTION KINETICS

SURAPONG SUVACHITTANONT^a and GEOFFREY A. LAWRANCE^b

Summary:The first determination of a volume of activation (V^T) for the dissociation of a neutral ligand (urea) from a formally neutral octahedral complex {trans-ch/orobis (dimethylg/yoximato)-ureacobalt(III) in aqueous solution is reported. The measured V^T of + 3.5 0.3 cm³mol^-1 is consistent with a dissociative mechanism with stretching of the cobalt-urea (0) bond rather than complete ligand release in the transition state.

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Department of Inorganic Chemistry, University of Melbourne, Parkvilssssssssssssssssle 3052, Australia

Received 9 January 1978