Abstract
New cationic P-coordinated (diphenylphosphino)alkyne complexes with molybdenum [(Mp)Ph 2PCCR][BF 4] {R=H, Me, t Bu, Ph, Tol; Mp=(C 5H 5)Mo(CO) 3} have been prepared from reaction between a (diphenylphosphino)alkyne Ph 2PCCR and the dinuclear complex [(C 5H 5)Mo(CO) 3] 2, with Ag(I) as oxidant. The bis(diphenyphosphosphino)acetylene Ph 2PCCPPh 2 led to the following homo- and heteronuclear metal complexes by the same method: [(Mp)Ph 2PCCPPh 2][BF 4], [(Mp)Ph 2PCCPPh 2(Mp)][BF 4] 2 and [(Mp)Ph 2PCCPPh 2(Fp)][BF 4] 2 {Fp=(C 5H 5)Fe(CO) 2}. The reaction of the P-coordinated molybdenum complexes [(Mp)Ph 2PCCR][BF 4] with dicobalt octacarbonyl at room temperature afforded the cationic heterometallic complexes [(Mp)Ph 2PC 2R{Co 2(CO) 6}][BF 4]. All complexes were characterised by microanalysis and IR, 1H-, 13C- and 31P-NMR spectroscopy.
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