Abstract A mononuclear RuCl 2 (DMSO)(TPPMS) 3 complex (1)(TPPMS= triphenylphosphine monosulfonate) has been synthesized. Spectroscopic analysis by ir, uv–vis., 1 H-, 13 C-, 31 Pn. mr, cyclic voltammetry, ms analysis and MO calculations were in agreement with a possible octahedral structure. Biphasic (H 2 O/PhMe) catalytic studies have shown good olefin hydrogenation activity by the complex at moderate temperature and pressure.
