The experimental data were reported by
(1) P. Dréan, J. Demaison, L. Poteau, and J.-M. Denis,
1996, J. Mol. Spectrosc. 176, 139;
and by
(2) L. Bizzocchi, S. Thorwirth, H. S. P. Müller, F. Lewen,
and G. Winnewisser,
2001, J. Mol. Spectrosc. 205, 110.
The H constant was kept fixed to the value from
(3) M. Jung, B. P. Winnewisser, and M. Winnewisser,
1997, J. Mol. Struct. 413414, 31.
The partition function takes into account
v2 = 0 and 1. Numbers in parentheses
refer to the ground vibrational state.
Predictions should be reasonable throughout.
The dipole moment was assumed to be the same as in the ground
vibrational state, see e044502.cat.
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