Cationic molybdenum complexes with P-coordinated (diphenylphosphino)alkynes

Article abstract of DOI:10.1016/S0022-328X(00)00256-4

New cationic P-coordinated (diphenylphosphino)alkyne complexes with molybdenum [(Mp)Ph₂PC≡CR][BF₄] {R = H, Me, ^tBu, Ph, Tol; Mp = (C₅H₅)Mo(CO)₃} have been prepared from reaction between a (diphenylphosphino)alkyne Ph₂PC≡CR and the dinuclear complex [(C₅H₅)Mo(CO)₃]₂, with Ag(I) as oxidant. The bis(diphenyphosphosphino)acetylene Ph₂PC≡CPPh₂ led to the following homo- and heteronuclear metal complexes by the same method: [(Mp)Ph₂PC≡CPPh₂][BF₄], [(Mp)Ph₂PC≡ CPPh₂(Mp)][BF₄]₂ and [(Mp)Ph₂PC≡CPPh₂(Fp)][BF₄]₂ (Fp = (C₅H₅)Fe(CO)₂}. The reaction of the P-coordinated molybdenum complexes [(Mp)Ph₂PC≡CR][BF₄] with dicobalt octacarbonyl at room temperature afforded the cationic heterometallic complexes [(Mp)Ph₂PC₂R{Co₂(CO)₆}][BF ₄]. All complexes were characterised by microanalysis and IR, ¹H-, ¹³C- and ³¹P-NMR spectroscopy.