METHYL- AND PHENYL-BIS(TERTIARY PHOSPHINE) N-BONDED CARBOXAMIDO COMPLEXES OF PLATINUM(II)

Article abstract of DOI:10.1016/S0022-328X(00)81388-1

Methyl- or phenyl-N-carboxamido-complexes of platinum(II) Pt(NHCOR')RL2 (L=PEt3, R=Me, R'=Me, CH=CH2; L=PEt3, R=Ph, R'=Me; L=PMe2Ph, R=Ph, R'= Me, Ph; L=PMePh2, R=Ph, R'=Me; L=PPh3, R=Ph, R'=Me) have been prepared by the reaction of KOH with cationic nitrile complexes BF4.Thermally unstable hydrido-N-carboxamido-complexes could be detected spectroscopically.IR and NMR (1H, 31P) spectra of some of the complexes indicate the existence of a solvent- and temperature-dependent equilibrium between syn- and anti-isomers arising from restricted rotation about theN<*>C bond of the carboxamido-group.The anti-isomer is favoured by nonpolar solvents and by increasing bulk of L.In the complex BF4, IR and NMR spectra show acrylonitrile to be bound through nitrogen, not through the olefinic C=C bond.