Kinetic Parameters of Copper(II) Complex of N-Hydroxy- N-(2-chloro-3-methyl)phenyl-N´-(2,6-dimethyl)-phenylbenzamidine Hydrochloride

Abstract

N-Hydroxy-N-(2-chloro-3-methyl)phenyl-N'-(2,6- dimethyl)phenylbenzamidine hydrochloride reacts with copper(II) to form water insoluble buff colored precipitate. The reaction is quantitative in the pH range 2.5-10.0. The thermal gravimetric analysis of the solid dry complex was done. The complex melts at 220 °C with decomposition. The decomposition takes place almost in one step in the range 220-500 °C. TGA data of decomposition has been used for the calculation of kinetic parameters i.e. energy of activation, frequency factor and entropy employing Coats-Redfern, Sharp-Wentworth, Piloyan-Novikova methods. The values obtained are in good agreement. The negative value of entropy suggests more ordered structure than free ligand.