The set of transition frequencies was updated and extended with respect to the first entry of April 2008. The J" = 0 transition frequency was improved considerably in
(1) O. Asvany, U. U. Graf, W. G. D. P. Silva, L. Schneider, S. Kabanovic, V. Ossenkopf-Okada, J. Stutzki, I. Savić, R. Güsten, O. Ricken, B. Klein, and S. Schlemmer, 2026, Phys. Chem. Chem. Phys., 28, 4662.
The J" = 1 transition frequency was taken from
(2) F. Matsushima, T. Oka, and K. Takagi, 1997, Phys. Rev. Lett., 78, 1664.
Additional rotational transitions have been measured with accuracies of about 150 MHz or somewhat better. J" = 6 was recorded by
(3) D. J. Liu, W. C. Ho, and T. Oka, 1987, J. Chem. Phys. 87, 2442.
J" = 10 – 18 in v = 0 and J" = 10 – 17 in v = 0 were taken from
(4) Z. Liu and P. B. Davis, 1997, J. Chem. Phys. 107, 337.
Additional v = 1 – 0 rovibrational data were taken from
(5) P. Bernath and T. Amano, 1997, Phys. Rev. Lett. 48, 20;
(6) A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, and B. J. McCall, 2014, J. Chem. Phys. 141, Art. No. 101101,
with P(3) omitted because of a large residual;
(7) M. W. Crofton, R. S. Altman, N. N. Haese, and T. Oka, 1989, J. Chem. Phys. 91, 5882;
(8) D. E. Tolliver, G. A. Kyrala, and W. H. Wing, 1979, Phys. Rev. Lett. 43, 1719.
The transitions should deviate from the predictions by less than three to five time the uncertainties because of the extensive input data set.
A ground state dipole moment value was published in
(9) M. Pavanello, S. Bubin, M. Molski, and L. Adamowicz, 2005, J. Chem. Phys. 123, Art. No. 104306.