High resolution infrared spectrum of 13CS2 between 250 and 430 cm−1

Abstract The high resolution infrared spectrum of 13 CS 2 between 250 and 430 cm −1 has been studied with a Fourier transform spectrometer at a resolution of about 0.010 cm −1 . The following bands are analyzed: the bending fundamental 01 1 0←00 0 0 of 13 C 32 S 2 and the associated “hot” bands 02 2 0←01 1 0, 02 0 0←01 1 0, 03 3 0←02 2 0, 03 1 0←02 0 0, 03 1 0←02 2 0, 11 1 0←10 0 0, the difference band 10 0 0←01 1 0 of 13 C 32 S 2 , and the bending fundamental 01 1 0←00 0 0 of 32 S 13 C 34 S. The polynomial fits were used in the analyses. The rotational constants B and D together with the vibrational term values have been derived for the states involved. The l -type doubling constant q has been obtained for the Π-states 01 1 0, 11 1 0, and 03 1 0 of 13 C 32 S 2 .