Reaction of [Os6(CO)16(MeCN)2] with 1 equivalent of 2-Aldrithol in CH2Cl2under ambient conditions afforded two new raft clusters [Os6(CO)16(μ3-η2-C5H4NS)2] 1 and [Os6(CO)17(μ-H)(μ4-η2-C5H4NS)] 2 in moderate and fair yields, respectively. Cyclic voltammograms of compound 1 exhibited two metal-based, one-electron reduction couples at E1/2= -0.36 and -0.20 V together with an irreversible ligand-based anodic wave at ca. Epa= +0.31 V vs. Ag-AgNO3. Protonation of 1 with CF3CO2H produced an unstable species [Os6(CO)16(μ3-η2-C5H5NSH)(μ3-η2-C5H5NS)][CO2CF3] 3, which upon standing in CH2Cl2quickly decomposed. All compounds have been fully characterised by spectroscopic methods, while the molecular structures of 1 and 2 were established by crystallographic techniques. Both 1 and 2 contain 'ladder'-type and edge-fused raft cluster cores, with the sulfur atom in 2 being drawn intimately into the cluster envelope. These clusters serve as good models for substrates adsorbed onto metal surfaces.
|Number of pages||4|
|Journal||Journal of the Chemical Society - Dalton Transactions|
|Publication status||Published - 7 Aug 1999|
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