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

The high resolution infrared spectrum of ¹³CS₂ 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 01¹0←00⁰0 of ¹³C³²S₂ and the associated “hot” bands 02²0←01¹0, 02⁰0←01¹0, 03³0←02²0, 03¹0←02⁰0, 03¹0←02²0, 11¹0←10⁰0, the difference band 10⁰0←01¹0 of ¹³C³²S₂, and the bending fundamental 01¹0←00⁰0 of ³²S¹³C³⁴S. 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 01¹0, 11¹0, and 03¹0 of ¹³C³²S₂.