Infrared Spectra and Potential Constants of Some Monohaloacetylenes

Abstract

The infrared spectra of gaseous HC≡CF, HC≡CCl, and HC≡CBr and their deutero-compounds have been obtained under prism dispersion between 250 and 3500 cm—1. All five fundamental vibrations have been identified for each of the hydrogen compounds and all but the lower bending mode for each of the deuterated compounds. Potential constants and vibrational amplitudes have been calculated.