Vibration-rotation Fourier transform infrared spectrum of the C-D and CC stretching fundamental, ν1 and ν2, band systems of deuterated monobromoacetylene

A high resolution vibration-rotation spectrum of deuterated monobromoacetylene (DCCBr) has been recorded with a Bruker IFS 120 Fourier Spectrometer in the wavenumber region 1700-2800 cm−1, which covers the C-D and CC stretching fundamental (ν1 and ν2, respectively) and the CC and C-Br stretching vibrational combination (ν2 + ν3) band systems. The analysis of the spectrum provides accurate vibrational term values and rotational constant for 20 vibration-rotation bands for both isotopic species, DCC79Br and DCC81Br.