THE 3[-0 CH STRETCH OVERTONE OF BENZENE

The second CH stretch overtone of benzene has been studied both experimentally and theoretically. A recent high-resolution opto-thermal experiment showed that the overtone spectrum consists of several absorption bands located in the region between 8730 and 8875 cm-1. In this work, we investigate possible contributions of strong hot bands to the absorption around 8770 cm-1. Our results show that this region of the opto-thermal spectrum is not significantly affected by hot bands. The spectrum has been described by a theoretical calculation based on the algebraic theory. We find good agreement with experimental results. The low-frequency region and minor satellite peaks are reproduced reasonably well. Quantum labels are assigned to some of the observed peaks.