Absolute OCS wavenumbers and analysis of bands in the region of the lowest fundamental ν2

Abstract The high-resolution infrared spectrum of carbonyl sulfide (OCS) in the region 490–560 cm −1 has been recorded with a Fourier transform spectrometer at a resolution of about 0.005 cm −1 . Measurements and analysis are given for the bands 01 1 0 ← 00 0 0, 02 2 0 ← 01 1 0, and 02 0 0 ← 01 1 0 of the 16 O 12 C 32 S isotopic species and for 01 1 0 ← 00 0 0 of the 16 O 12 C 34 S species.