Studies on preparation, characterisation and metal-ion assisted aquation of [Co(pn)(dien)X]X₂·H2O (X = Cl, Br)

Abstract

Chloro and bromo complexes of the type [Co(pn)(dien)X]X₂·H₂O (X = Cl, Br) have been synthesized and found to have unsymmetrical <em>fac</em>-configuration from their ¹³C NMR data. Kinetic parameters for aquation of these complexes have been determined in nitric acid medium at constant ionic strength (<em>μ </em>= 1.0 mol dm^-3). It is found that the bromo complex reacts faster than the chloro complex and the efficacies of the metal-ions follow the order: Hg<img src='http://www.niscair.res.in/jinfo/twoplustwo.gif' border=0>> Ag⁺.