KINETIC-ANALYSIS OF THERMOGRAVIMETRIC DATA .13. THERMAL-DECOMPOSITION OF COMPLEXES OF TYPE [CO(EN)2(PYRIDINE)CL]X2

Kinetic parameters of the dehydration of AC12.1.5 H2O, and of the substitution of pyridine by the outer sphere anion, have been derived from the TG curves of ACI2. 1.5 H2O, ABr2 and AI2 (A=[Co(en)2(pyridine)Cl]) by using the author's nomogram method and the Coats-Redfern method. The influences of sample weight and of heating rate have been studied. Statistical analysis of the results shows the apparent activation energy E of the substitution reaction to decrease in the order CI > Br > I, while both E and the pre-exponential factor values decrease with increasing sample weight and increasing heating rate. The kinetic compensation effect is discussed. © 1979 Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest.