Vibrational Spectra and Force Constants of Tetrasulfurtetranitride, S4N4 [1

Abstract

Abstract Infrared and Raman spectra of solid and dissolved S4 14N4 and of solid S4 15N4 have been recorded and assigned in accordance with the molecular point group D2d. 22 of the 28 fundamental vibrations of both molecules have been identified and used to calculate force constants applying a modified Urey-Bradley force field with 9 independent constants. Good agreement between observed and calculated wavenumbers was obtained, and both Urey-Bradley and valence force constants are given. The results indicate that-S4N4 basically contains eight SN single bonds and two extremely weak SS bonds.