Reactions of bis(trimethylsilyl)isocyanamide and its isomers with chlorotriphenylphosphonium chloride: evidence for a transient dizomethylenetriphenylphosphorane. Crystal structure of NN->2

Article abstract of DOI:10.1016/0022-328X(89)80114-7

Triphenylphosphine dichloride reacts with (Me3Si)2C=NN, Me3SiN=C=NSiMe3, and metal-coordinated CN-N(SiMe3)2 to give the iminophosphoranes CN-NPPh3, NC-NPPh3, and W(CO)5CN-NPPh3, respectively, and with free bis(trimethylsilyl)isocyanamine to give a dicatio