Optically active complexes (μ-H)Os3(μ-OCNH-(R)-CHMePh)(CO)10: the absolute configuration of the (+)-rotating stereoisomer

Room-temperature interaction between Os3(CO)11NCMe and (R)-(+)-1-phenylethylamine at ambient temperature in THF gives two known diastereomeric clusters (μ-H)Os3(μ-OCNH-(R)-CHMePh)(CO)10 in an approximate ratio 1:2. 1H-NMR, IR and [α]D characteristics are described for them. The (+)-diastereomer characterized by absolute-configugational data obtained from the X-ray analysis of its single crystal.