Abstract: | The mass spectra of many triphenyl/tetraphenyl derivatives of the Group IV and V elements exhibit the processes M+˙ ? C12H10] and/or M+˙ ? C6H5· ? C12H10]. These fragmentations are not preceded by hydrogen scrambling between all the phenyl rings. Hydrogen scrambling does occur in certain fragment ions prior to fragmentation in both the positive and negative-ion spectra. The process M+˙ ? C12H10] occurs in the negative-ion mass spectrum of tetraphenylsilane. |