Kinetics and Mechanism of Acid Hydrolysis of Some (Substituted Salicylato) Pentaammine-Cobalt(III) Complexes

Department of Chemistry, Utkal University, Bhubaneswar-4

Department of Chemistry, B. J. B. College, Bhubaneswar-6

Manuscript received 6 December 1975, revised 6 March 1976 ,· accepted 11 March 1976

The acid hydrolysis of some pentaammine(substituted salicylato) cobalt(lll) complexes has been studied spectrophotometrically in the temperature range 65°-80° in a medium of 1.0 M ionic strength adjusted with NaClO_4.

Aquation of the complexes proceed by two parallel paths, one independent of [H⁺] and another first-order in [H⁺]. Rate constants and activation parameters for both the paths have been determined.