Abstract:
The fragmentation behavior of aryltin compounds [(p-ThAnis)nSnPh4.n (n=l-4);
(p-ThAnis)3SnX (X=C1, Br, I); (o-CH30C6H4)3SnCl; Ph3Sn(o-pyr)] have been studied
comparatively under EI and FAB ionization modes. Alkali halides were run under FAB
mode.
For the aryltin compounds, the effect of ligand type on the spectra have been
explored in both EI and FAB modes. The fragmentation mechanisms have been examined
with linked scans, such as fragment ion scans (B/E) and parent ion scans (B^/E). Ab
Initio molecular orbital calculations were used to determine the structures of the
fragments by comparing their relative stabilities. In the EI MS studies, negative ion EI
mode has also been used for some of the aryltin compounds, to examine the possible ion
molecule reactions under low pressures at 70eV. In the positive ion FAB MS studies,
matrix optimization experiments have been carried out. Negative ion FAB experiments of
all the compounds have been done in two different ways. Finally, the comparison of the
two methods, EI MS and FAB MS, have been made.For alkali halides, the studies focused on the FAB MS behavior under different
conditions. The intensities of cluster ions were reported, and the anomalies in the
intensity distribution was also discussed.
