Carbonyl-π-cyclopentadienyl complexes of molybdenum

Abstract

A number of derivatives of the halogenocarbonyl-π-cyclopentacarbonylmolybdenum complexes C₅H₅Mo(CO)₃X (X = Cl or l) has been prepared. Three types of compound have been isolated: (i) those containing the substituted cation [C₅H₅Mo(CO)₂L₂]⁺, where L = PEt₃ and PPh₃ or L₂= 1,2-bisdiphenylphosphinoethane (Diphos) and o-phenylenebisdimethylarsine (Diars); (ii) the monosubstituted halides C₅H₅Mo(CO)₂LCl, where L = PPh₃, AsPh₃, SbPh₃, and 1/2Diphos, and C₅H₅Mo(CO)₂Ll, where L = PEt₃, P(cyclohexyl)₃, PPh₃, P(OPh)₃, AsMePh₂, AsPh₃, and SbPh₃; (iii) the disubstituted halides C₅H₅Mo(CO)L₂Cl, where L = PEt₃, PPh₃, AsPh₃, and SbPh₃ and L₂= Diphos, and C₅H₅Mo(CO)L₂l, where L = PEt₃, P(OPh)₃, AsMePh₂, and SbPh₃, and L₂= Diphos and Diars. The physical properties of these complexes are presented and discussed.