REACTIONS OF ALKYNES WITH BIS(TRIPHENYLPHOSPHINE)PLATINUM-ETHYLENE: A 31P- NMR STUDY

Article abstract of DOI:10.1016/S0022-328X(00)80899-2

Internally consistent assignments of the 31P-<1H> NMR parameters of the complexes CR')(PPh3)2> are proposed, based on the premise that the magnitude of 1J(PtP) depends mainly on the nature of the moiety <*>CR trans to P.For a given R, 2J(PP) correlates with 1J(PtP) for the bond trans to <*>CR.The alkynes PhC<*>CSnEt3, PhC<*>CSnPh3, Me3SiC<*>CCl, Me3SiC<*>CBr, Et3SiC<*>CI and MeC<*>CI undergo oxidative addition reactions with ; the intermediate alkyne complex was detected for PhC<*>CSnEt3, Me3SiC<*>CCl and Me3C<*>CBr.The triyne Me(C<*>C)3Me forms platinum(0) complexes by coordination with the central or terminal C<*>C bond and appears also to give a platinum(II) complex by oxidative addition.