Electron Impact Fragmentation of Mixed and Asymmetric Benzyltin Compounds

The mass spectra of seventeen mixed and of five asymmetric benzyltin compounds are described and analysed. The proposed fragmentation pattern is in agreement with the hypothesis of preferred Sn(IV) and Sn(II) valence states in the tin‐containing fragments, which are reached by a loss of a radical from the molecular ion, or by the loss of an alkene or alkane from a favourable valence state.