The Far-Infrared Spectrum of ClNO2 Studied by High-Resolution Fourier-Transform Spectroscopy.

The far-infrared spectrum of nitryl chloride was studied using high-resolution Fourier-transform spectroscopy in the 300-525 cm-1 region. Vibrational band centers of fundamental, hot, and difference bands were determined. Furthermore, rotational and centrifugal distortion constants up to fourth order for the nu3 bands of 35ClNO2 and 37ClNO2 (centered at 370 and 364 cm-1, respectively) were obtained. The nu5 fundamental of ClNO2 (predicted around 410 cm-1) is very weak and overlapped by difference bands. Copyright 1998 Academic Press.