Organometallic compounds. V. Mass spectra of some aryltrimethyltins

The mass spectra of a series of aryltrimethyltins are described and analysed. The main features are: a relatively weak molecular ion, a very important ArSnMe 2 + ion (base peak), a low intensity ArSnMe + fragment and a non negligible ArSn + peak. These findings may be related to the well known stable valence states of tin ( IV Sn and II Sn) and the unfavourable III Sn and I Sn states. Whereas a methyl group is easier to cleave from the ArSnMe 3...