ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 31, Number 4
JKCSEZ 31(4)
August 20, 1987 

Kinetic studies on the complexing of [Mo2O4(H2O)6]2+ with thiocyanate have been carried out using the spectrophotometric method. The observed rate constant is given by, kobsd = {ko + kH[H+]} [SCN-]2 + kr. At 25℃ and ionic strength of 2.84 the values of kf and kr are 5.96 ± 0.35 M-2s-1 and (5.45 ± 4.77) × 10-4s-1, respectively. Activation parameters from data at 20°∼ 35℃ are ΔH* = 38.04 ± 5.31kJmol-1 and ΔS* = -172.69JK-1mol-1. The mechanisms are discussed.