The experimental lines were reported by
(1) M. Winnewisser, E. W. Peau, K. Yamada, and J. J. Christiansen, 1981, Z. Naturforsch. 36a, 819; by
(2) M. Winnewisser and F. Holland, 1986, Astron. Astrophys. 157, 19; by
(3) F. Holland, U. Fleischer, A. Klesing, and D. H. Sutter, 1993, J. Mol. Spectrosc. 87, 44; by
(4) V. Wagener, M. Winnewisser, and M. Bellini, 1996, J. Mol. Spectrosc. 176, 425; and by
(5) M. Winnewisser, H. Lichau, and F. Wolf, 2000, J. Mol. Spectrosc. 202, 155.
The J" = 95 line, reported in (2), was already omitted in that work. In addition, the J" = 121 line from that work was weighted out because it was the only line to require L to be used in the fit. Moreover, the remaining lines from that work fit much better without this line. As a consequence, predictions well beyond J = 100 should be viewed with some caution. However, the predictions should be well beyond astronomical needs.
The partition function values should only be used for low temperatures as the lowest bending mode is at 77.5835 cm^–1 or 111.625 K.
The dipole moment is from
(1) M. Winnewisser and E. W. Peau, 1982, Chem. Phys. 71, 377.