Fast atom bombardment mass spectra of stibonium salts

Abstract

AbstractThe positive‐ion fast atom bombardment (FAB) mass spectra of stibonium salts have been studied. The spectra exhibit an abundant intact cation (C+) and fragment ions resulting from the loss of R, R′ or stable neutral species from the cation. The principal fragment ions in the FAB mass spectra of stibonium salts are [R3Sb]+·, [R2Sb]+, [R2SbH2]+, [RSbR′]+, [RSbH]+, [RSb − H]+ and [R2SbR']+·. In most cases, [ M + C] + cluster ions were detected. When the anion was bromine, the adduct ions [M + (R − H)Sb]+, [C + (R‐H)]+ and [ C + (R′ − H)]+ were also observed, whereas when the anion was [BPh4]−, interesting cluster ions such as [M + (BR′ ‐ H)]+ and [M + (BR′ − 3H)]+ appeared.