The pure rotational data have been reported by
(1) M. Tanimoto, S. Saito, and E. Hirota, 1986, J. Chem. Phys. 84, 1210.
The predictions are deemed to be reliable up to about 1.0 THz. Predictions of weaker fine or hyperfine structure components should be viewed with additional caution.
The dipole moment is from an ab initio calculation by
(2) H. S. P. Müller, 2009, unpublished.