Syntheses and crystal structure of bridged Os3-clusters with chiral 3-carane-type ligands

Reaction of (μ-H)2Os3(CO)10 cluster with (1S,3S,6R)-3-dimethylaminocarane-4-one E-oxime results in loss of dimethylamino group and formation of (μ-H)Os3(CO)10(μ-ONC) cluster (43%). Treatment of cluster Os3(CO)11(NCCH3) with (1S,3S,6R)-3-mercaptocaran-4-one E-oxime gives cluster (μ-H)Os3(CO)10(μ-S⋯) in 86%, whose structure was proved by X-ray single crystal analysis. Decarbonylation of the later compound with (CH3)3NO leads to a diastereomeric mixture of (μ-H)Os3(CO)9(μ,η2-(S,N)⋯) clusters in 64% yield.