Recognition of the violet system of S2Cl in the pyrolysis of S2Cl2

Publisher Website
Google Scholar
Abstract
A total of 37 absorption bands, lying between 3785 and 4805 Å, have been observed during the pyrolysis of S2Cl2 at 750 K. These bands have been tentatively assigned to transitions between the X̃ A″ state of S2Cl to an unidentified electronically excited state with vibrational frequencies ω′1 =480 cm−1 and ω2 =407 cm−1. From this assignment it follows that the ground state vibrational frequencies are ω″1 =659 cm−1, ω″2 =600 cm−1, and ω″3 =336 cm−1. A simple molecular orbital diagram has been constructed from the frontier orbitals of S2 and Cl. The predicted changes in the bond strengths and bond angles between the ground state and the excited state are consistent with experimental assignments.