ON THE SYNTHESIS AND CHARACTERIZATION OF 2 RUTHENIUM WATER-SOLUBLE COMPLEXES - PRELIMINARY-RESULTS ON THE HYDROGENATION OF CINNAMALDEHYDE IN A BIPHASIC SYSTEM - SURFACE-ACTIVITY OF THE LIGANDS TPPMS AND TPPTS

The synthesis, characterization and preliminary hydrogenation studies, on the reduction of an aldehyde to alcohol, of two water-soluble ruth enium complexes are being reported. The complexes [HRuCl(CO)P(3)] wer e prepared by ligand exchange in a biphasic medium. P corresponds to the water soluble phosphines: TPPMS (I), the sodium salt of m-monosulf onated triphenyl phosphine, [Ph(2)P(C6H4SO3Na) . 2H(2)O], and TPPTS (I I), the trisodium salt of m-trisulfonated triphenyl phosphine, [P(C6H4 SO3Na)(3) . nH(2)O]. Spectroscopy investigations have shown that in so lution complexes I and II have the same structures as their organosolu ble analog [HRuCl(CO)(PPh(3))(3)]. Critical micellar concentration (CM C) studies and surface tension measurements showed that the water-solu ble ligand TPPTS is a poor surface active agent as compared with the T PPMS ligand. Preliminary results on the hydrogenation of ti ails-cinna maldehyde (CNA) with complexes I and II were carried out. The reductio n of CNA proceeds through two parallel routes in both cases. Effect of the pressure and temperature is observed in the hydrogenation of CNA with I and II.