The lower state conformer of hydroxyacetonitrile is the doubly degenerate gauche conformer. Tunneling occurs between the symmetric and antisymmetric components. The tunneling components are connected via c-type transitions. The extensive mmw and sub-mmW data were published by
(1) L. Margulès, B. A. McGuire, M. L. Senent, R. A. Motiyenko, A. Remijan, J.C. Guillemin, 2017, Astron. Astrophys. J.,, in press.
The predictions should be sufficient for astronomical observations. Caution is advised if the predicted uncertainties exceed 200 kHz.
The ¹⁴N hyperfine splitting was deemed to be negligible for astronomical observations.
The dipole moment components were determined in (1) by means of quantum chemical calculations.