Kinetics of Aquation of Chloropenta-amminecobalt(III) perchlorate in Dicarboxylate Solutions Containing 10% Ethanol at 40°

Department of Chemistry, Faculty of Science, Alexandria. University, Egypt

Department of Chemistry, Faculty of Science, Mansoura University, Egypt

Manuscript received 29 Juno 1981, revised 28 January 1982, accepted 28 December 1982

A new empirical correlation between the observed first order rate constant, k_obs, and tbe stoichiometric concentrations of the dicarboxylate anions, C_L, was obtained in tbe aquation of chloropenta-amminecobalt(III) perchlorate at 40° in six different dicarboxylate solutions containing 10% ethanol. It takes the form

               k_obs = k_o + c/d [(k_obs)_max -k_o]. C_L

where c and d are empirical constants of values 7.4 x 10^-5 and 11.8 x 10^-7, respectively. A reaction mechanism wbicb would explain the above equation was investigated.