Two new disubstituted derivatives of the clusters Rh6(CO) 16 and H4Ru4(CO)12 with the heterobidentate ligand [Ph2P(2-CH3SC6H 4)] were synthesized. Structures of these compounds were completely characterized both in solid phase and solution. The H4Ru 4(CO)10[k2(P,S)-Ph2P(2-CH 3SC6H4)] cluster is an example of a structure, in which a chelating coordination of a heterobidentate ligand results in the occurrence of a center of asymmetry associated with the substituted metal atom. This type of polynuclear complexes is of interest for obtaining essentially new catalysts for asymmetric synthesis on the basis of cluster compounds.
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