The Complex Aqueous Chemistry of RUC12(TPPTS)3 and its Reaction with Dihydrogen

Abstract The water-soluble complex RUCl2(TPPTS)3 has been prepared. In aqueous solution the complex undergoes both CI and TPPTS dissociation, but has been characterized in solution. The reaction with H2 occurs readily through at least two separate mechanisms. The slower step is independent of [CI ] and probably involves direct reaction of H2 with RUCl2(TPPTS)3. A much more rapid step is strongly inhibited by [CI"] and probably involves CI dissociation, perhaps two CI dissociations. In the presence of excess CI the kinetics are well-behaved showing a first-order dependence on [RUCl2(TPPTS)3] and [H2].