1,1,2,2,2,2,3,3,3,3-Decacarbonyl-1-(η-cyclohexa-1,3-diene)-triangulo-triosmium: a novel intermediate in synthetic osmium cluster chemistry

Cyclohexadiene reacts with [Os3(CO)10H2] under moderate conditions to give [Os(CO)10(C6H8)]. Some reactions of this compound with alcohols, thiols, amines, halogen and organic acids, ethylenes, and acetylenes have been examined, and it is shown that cyclohexa-1,3-diene is a very good ‘leaving group’ and provides a convenient route to a number of triangulo-Os3 cluster compounds.