Abstract
The kinetics of the acid-catalysed dissociation of tris(biguanide)rhodium(III) ion into diaquobis(biguanide)rhodium(III) ion in aqueous perchloric acid media have been investigated spectrophotometrically and activation parameters for the reaction have been evaluated. The observed dependence of the rate on acid concentration and the Hammett acidity function, Ho, suggests the operation of S N1CA mechanism.
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