1,2-Bis(di-p-tolylphosphino)ethane complexes of Group VI metal carbonyls

Article abstract of DOI:10.1016/0022-328X(88)80529-1

New complexes of the type (M=Cr, Mo, W) have been isolated from the reaction of the ligand, 1,2-bis(di-p-tolylphosphino)ethane (dptpe) with Group VI metal hexacarbonyls in a suitable solvent such as methylcyclohexane.The resulting complexes on treatment with an excess of pyridine produces the mixed ligand complexes , whereas the reaction of 3-allyl)(MeCN)2> (X=Cl, Br) with dptpe gives 3-allyl)(dptpe)>.The formulation of the structures of these complexes follows from elemental analyses and 1H NMR, 31P<1H> NMR and IR spectral studies.Carbonyl force constans have been calculated from the ν(CO) streching frequencies by the Cotton and Krainhanzel method.