Through the reaction of Co2(CO)8 with 5 thioureas R1NHC(S)NHR2, Co3(CO)7(m3-S)[m-h2-RNC(S)NHR2] were prepared and characterized by elemental anal., IR, 1H NMR, and mass spectroscopy. The crystal structure of the cluster with R1 = Ph and R2 = CH2Ph was determine by x-ray single crystal diffraction: triclinic, space group P1, a 0.9116(1), b 1.2289(2), c 1.2518(2) nm, a 115.56(1), b 100.94(2), g 93.39(1)? Z = 2, R = 0.033, Rw = 0.046. The mol. contains a tetrahedral cluster framework Co3S; all carbonyls are terminal ligands of 3 Co atoms; and PhNC(S)NHCH2Ph as bridging ligand links up with 2 Co atoms of the framework by S and N atom-a 5-membered ring of Co2NCS was formed.

Key words: CRYSTAL STRUCTURE DETERMINATION, X-RAY DIFFRACTION ANALYSIS, SULFOCARBAMIDES, CARBONYL COMPOUNDS, CLUSTER COMPOUND, COBALT COMPLEX, BRIDGE COMPOUNDS