Fast atom bombardment mass spectra of silatranes and silocanes

Silatranes and Their Tricyclic Analogs

“…They lead to formation of [MH OCHR 0 CH 2 ] C and [MH OCH 2 CR 2 ] C ions as products of side chain elimination from the MH C ions. An˛-cleavage with elimination of benzaldehyde molecule from the molecular ions was observed in the spectra of 1-methyl-and 1-benzyl-3,7-diphenylsilatranes 291 .…”

“…In the FAB mass spectra of 1-phenyl-3,7-dimethyl-10,11-benzosilatrane, the most intensive peak corresponds to the [M X] C ion 291 . presence of a catalytic amount of a bis(phosphine)platinum or -palladium dichloride 312,409 .…”

“…Characteristic features of the FAB spectra of silatranes are also maintained in the spectra of 1-phenyl-2-azasilatrane and 1-phenyl-3,7-dimethyl-10,11-benzosilatrane 291 …”

“…The reaction of phenyltris(dimethylamino)silane with bis(2-hydroxyethyl)(2-aminoethyl)amine affords 1-phenyl-2-azasilatrane (210) in a small yield (equation 193) 291 …”

“…The fast atom bombardment (FAB) mass spectra of 1-organylsilatranes are also characterized by the most intensive [M X] C ion peaks 286,288 291 . As a rule, the intensity of their molecular ion peaks is weak, whereas the content of the quasi-molecular MH C ions varies from large for 1-alkyl (and 1-alkoxy) derivatives to small for 1-phenyl-and 1-heteroarylsilatranes.…”