Integrated infrared intensities in cyanogen

Abstract

The integrated intensities of the fundamental modes in cyanogen have been measured by the Wilson–Wells–Penner–Weber method. The results are 4.55±0.04 km mol⁻¹ for the fundamental at 2149 cm⁻¹ and 36.28±0.32 km mol⁻¹ for the fundamental at 226 cm⁻¹. The dipole moment derivative for the Π_u mode obtained from these measurements and that obtained from ab initio calculations using a STO‐NG basis set are found to be in essentially exact agreement with each other, although there is some disagreement in magnitude for the Σ⁻_u mode.