PREPARATION AND REACTIVITY OF METAL-CONTAINING MONOMERS .31. SYNTHESIS AND PROPERTIES OF OSMIUM-BASED AND RUTHENIUM-BASED TRINUCLEAR CLUSTER MONOMERS - THE CRYSTAL AND MOLECULAR-STRUCTURE OF (MU-H)OS3(MU-4-VPY)(PPH3)(CO)9

Starting with the trinuclear clusters, M3(CO)12 (where M = Os or Ru), Os3(CO)11(NCCH3), Os3(CO)10(NCCH3)2, and (mu-H)Os3(mu-OR)(CO)10 (where R = H or Ph), and polyfunctional organic compounds containing vinyl o r allyl groups, a number of cluster monomeric complexes have been synt hesized containing ligands with an uncoordinated C=C bond, viz.: (mu-H )OS3(mu-4-Vpy)(CO)10, (mu-H)Os3(g-O2CCH=CH2)(CO)10, (mu-H)Os3(mu-OCNHC H2CH=CH2)(CO)10, and (mu-H)M3(mu-SCH2CH=CH2)(CO)10. The (g-H)Os3(mu-4- Vpy)(PPh3)(CO)9 complex was investigated by X-ray diffraction analysis .