Phosphonium zwitterions of a known type were obtained in high yield via a 1: 1 reaction of p- benzoquinone or methoxy-p-benzoquinone with the tertiary phosphines R3P [R=(CH2) 3OH, Ph, Et, Me] and Ph2MeP, in acetone or benzene at room temperature. In all cases, attack of the P-atom occurs at a C-atom rather than at an O-atom. The products were characterized to various degrees by elemental analysis, 31P {1H}, 1H and 13C NMR ...
