The microwave torsional-rotational spectrum of CHD 2OD

Abstract

The microwave torsional-rotational spectrum of CHD 2OD has been predicted, identified, assigned, and analyzed to determine the internal rotation potential energy coefficients and nonrigidity corrections for the molecule. Although trans to gauche transitions are too weak for observation in the torsional ground states, transitions have been observed within and/or between three excited torsional states as well as the usual gauche(+) to gauche(−) transitions for the torsional ground states. Taken together, these allow for the determination of the potential energy coefficients. The potential energy coefficients for CHD 2OD are V 1 = −8.73 ± 0.05 cm −1, V 2 = −2.90 ±0.10 cm −1, and V 3 = 365.00 ± 0.25 cm −1.