ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 30, Number 4
JKCSEZ 30(4)
August 20, 1986 

Monoxo-bridged binuclear molybdenum(V) complex, [Mo2O3(bipy)2(NCS)4] in aqueous acetone mixture produces the corresponding dioxo-bridged binuclear molybdenum(Ⅴ) complex, [Mo2O4(bipy)2(NCS)2]. The rate of conversion of [Mo2O3(bipy)2(NCS)4] to [Mo2O4(bipy)2(NCS)2] has been measured by spectrophotometric method. The rate of formation of dioxo-bridged binuclear molybdenum(V) complexes with solvent water follows the rate law, rate = k[Mo2O3(bipy)2(NCS)4][H2O]. The reaction mechanism for the formation of dioxo-bridged complex is discussed. The observed negative volume of activation shows that the complex is strongly attracted to the solvent molecules at transition state.