Metal perfluoroalkane- and perfluoroarene-thiolates. Part V. The reactions of tricarbonyl(π-cyclopentadienyl)-molybdenum and -tungsten thiolates and acetylenes

Abstract
The thiolates [(η5-C5H5)M(CO)3SRF](M = Mo or W; RF = CF3 or C6F5) react with acetylenes, RCCR (R = CF3, Me, or Ph) to give the formally electron-deficient π-acetylene complexes [(η5-C5H5)M(CO)(RC2R)SRF]. The bonding and isomerism in these complexes at low temperatures is discussed. On oxidation [(η-C5H5)MoO(CF3C2CF3)SC6F5] can be isolated. Trifluoropropyne reacts with the thiolates to give the acetylene complex [(η5-C5H5)Mo(CO)(CF3C2H)SC6F5] and cyclopentadienone complexes [(η5-C5H5)Mo(CO){(CF3C2H)2CO}SCF3] and [{(η5-C5H5)[(CF3C2H)2CO]SCF3}2].

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