Electron impact mass spectral interpretation for some thiophosphoryl-p-acetylaminobenzenesulfonamides

This work discusses the synthesis and the fragmentation patterns for 2-(p-a cetylaminosulfonamido)-2-thiono-(5,5-dimethyl-1,3,2-dioxaphosphorinane)(1) and for the p-acetylaminosulfonylamides of O,O-diethylthiophosphoric acid ( 2), O,O-diphenylthiophosphoric acid (3), dimethylaminocyclohexylthiophospho ric acid (4), and diethylaminophenylthiophosphoric acid (5). A thionamidict hiolimidic structure was attributed to compounds 1-5, consistent with their IR and NMR spectra. EI mass spectra at 70 eV, high resolution. (HR) mass m easurements and metastable ion spectra were used to elucidate the fragmenta tion processes and to determine the kinetic energy release values associate d with the metastable ion dissociations. HR accurate mass measurements were used to confirm the compositions of the more abundant ions. Copyright (C) 2001 John Wiley & Sons, Ltd.