The reaction of the dinuclear cobalt compound [(CpCoS2C2B10H10)(CpCoSC2B10H11)(n-C4H9S)] (1) with HC
CC(O)Fc leads to the cobalt-free products (C2B10H10)(SCH
CHCOFc)2 (4–6), (S2C2B10H10)(HC
CCOFc) (7), and (C2B10H11)(SCH
CHCOFc) (8, 9). 4–6 are produced by hydrosulfuration of the alkyne at the 1,2-dicarba-closo-dodecaborane-dithiolate ligand with the generated vinyl groups in Z/Z, Z/E and E/E configurations, respectively. In 7, the alkyne is added to 1,2-dicarba-closo-dodecaborane-dithiolate at the two sulfur sites. 8 and 9 are the products of alkyne hydrosulfuration at the 1,2-dicarba-closo-dodecaborane-1-monothiolate ligand with the generated vinyl group in either Z or E configuration. The treatment of 1 with HC
CCO2Me gives rise to the parallel products (C2B10H10)(SCH
CHCO2Me)2 (10–12) and (C2B10H11)(SCH
CHCO2Me) (13, 14). All of the new compounds have been characterized by IR, NMR, elemental analysis and mass spectroscopy. The structures of compounds 4, 7, and 8 have also been determined by single-crystal X-ray diffraction analysis.
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