Infrared spectrum and vibrational potential function of thionylimide (HNSO)

The ir absorption of gaseous HNSO, DNSO and H ¹⁵NSO is recorded in the range 300-4100 cm ^-1 at medium resolution. Besides the fundamental vibrations, overtones and combination bands are measured and assigned. From these data, combined with the ir absorptions of four more isotopic species of thionylimide, and with the centrifugal distortion constants of HNSO and DNSO, a harmonic force field, with 11 constants was derived.