CpRu(PPh3)2Cl (CP = eta5-C5H5, eta5-MeC5H4) react with (RO)2PS2M (M =
Na, K, HNEt3; R = Me2CH-, Et-, Ph-, p-MeC6H4-, alpha-naphthyl, o-pheny
lene) in MeOH to give new derivatives of ruthenium of the type CpRu(PP
h3)nS2P(OR)2 (n = 1 or 2). These compounds were characterized by eleme
ntal analysis, NMR and IR spectra.