The v1/5 - v1/4 far-infrared bands of (D₁)acetylene and (D₂)acetylene

Abstract

Rotational lines in the v1/5 v1/4 band of DC=CH and DC=CD have been located and measured at a spectral slit width of 0.3-0.4 cm^-1. Spectroscopic constants obtained from analysis of the lines are consistent with more accurate constants obtained from mid- and near-infrared, and microwave work.