Mass Spectrometric Study of the Vapor-Phase Species of Brominated Polymeric Sulfur Nitride and Tetrasulfur Tetranitride

Abstract

The gas-phase species volatilized from (SN)x treated with bromine and tetrasulfur tetranitride (S4N4) treated with Br2 and IC1 were studied using mass spectrometric techniques. Conventional electron impact, chemical ionization, modulated molecular beam, and phase-angle mass spectrometry techniques were used to identify the gas-phase species. The species volatilized from brominated (SN)X and brominated S4N4 were identical, consisting of Br2, NSBr, (SN)4 isomers, and smaller amounts of HBr, S2Br2, and other sulfur-nitrogen compounds. The gas-phase species observed over S4N4 treated with IC1 were I2, IC1, S4N4, NSC1, HC1, HI, and small amounts of S2Cl2 and other sulfur-nitrogen compounds; Cl2 and NSI were not observed. The vapors of S4N4 brominated in CS2 solution were examined and found to yield HSCN, BrSCN, and CS3N2 species, in addition to HBr, NSBr, Br2, and sulfur-nitrogen compounds. The gas-phase products formed on exposure of brominated samples to air were also studied. © 1978, American Chemical Society. All rights reserved.