HNC, v2 = 1
Hydrogen isocyanide, v2 = 1
Species tag 027504
Version1*
Date of EntryFeb. 2005
ContributorH. S. P. Müller

The v = 0 and v2 = 1 data have been fit together. In contrast to the Dec. 2000 entry, now two entries are given, one for each state. Moreover, a different frequency was used for the v = 0, J = 1 – 0 transition. Therefore, the v = 0 entry has a new version number. Besides J as the first quantum number, the l value and a vibrational identifier are the second and third quantum number, respectively.
The v = 0, J" = 0 transition was taken from
(1) R. J. Saykally, P. G. Szanto, T. G. Anderson, and R. C. Woods, 1976, Astrophys. J. 204, L143;
the v = 0, J" = 1 transition was taken from
(2) R. A. Creswell, E. F. Pearson, M. Winnewisser, and G. Winnewisser, 1976, Z. Naturforsch. A 31, 221;
the J" = 2 and 3 transitions were from
(3) T. Okabayashi and M. Tanimoto, 1993, J. Chem. Phys. 99, 3268;
the remaining transitions up to 2 THz were published by
(4) S. Thorwirth, H. S. P. Müller, R. Gendriesch, F. Lewen, and G. Winnewisser, 2000, Astron. Astrophys. 363, L37.
Also employed in the fit were rovibrational transitions from
(5) J. B. Burkholder, A. Sinha, P. D. Hammer, C. J. Howard, 1987, J. Mol. Spectrosc. 126, 72; and from
(6) A. G. Maki and G. Ch. Mellau, 2001, J. Mol. Spectrosc. 206, 47.
The partition function takes into account both vibrational states. Individual contributions of the vibrational states to the partition function are available.
The dipole moment was reported by
(7) G. L. Blackman, R. D. Brown, P. D. Godrey, and H. I Gunn, 1976, Nature 261, 395.
It was assumed to be equal for both states.

Lines Listed127
Frequency / GHz< 4247
Max. J47
log STR0-8.0
log STR1-7.8
Isotope Corr.-0.0
Egy / cm-1464.24
 µa / D3.05
 µb / D 
 µc / D 
 A / MHz 
 B / MHz45484.46
 C / MHz 
 Q(500.0)351.1385
 Q(300.0)168.0617
 Q(225.0)114.4309
 Q(150.0)70.9104
 Q(75.00)34.8232
 Q(37.50)17.5752
 Q(18.75)8.9599
 Q(9.375)4.6588
detected in ISM/CSMyes


Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder