Kinetic and Mechanistic Study of Substitution Reaction of the Aqua-ligands from Hexa-aquochromium(III) Ion by Glutatnic Acid

Department of Chemistry, University of Burdwan. Burdwan-713 104 Manuscript received 3 February 1990, revised 1 March 1991, accepted 31 May 1991 Kinetics of substitution of aqua-ligands from hexa-aquochromium(III) ion by glutamic acid (GluH) In aqueous medium has been studied spectrophotometrically and the rate law has been established at pH 2.7. The reaction rate is found to be pH-dependent in the pH range 2.0-5 0. Activation parameter have been calculated and compared with water-exchange reaction and other substitution reactions of hexa-aquocbromium(III) ion A mechanism involving outer sphere association between the two reactant species followed by transformation of this outer sphere complex into the product by associative path has been suggested