HC3N, v2 = 1
Cyanoacetylene, Propynenitrile, v2 = 1
Species tag 051520
Version1*
Date of EntryOct. 2007
ContributorH. S. P. Müller

The experimental frequencies have been reported by
(1) M. E. Sanz, M. C. McCarthy, and P. Thaddeus, 2005, J. Chem. Phys. 122, Art.-No. 194319.
ν2 infrared transitions were also used in the fit. They were taken from
(2) K. M. T. Yamada, R. Best, and G. Winnewisser, 1983, Z. Naturforsch. 38a, 23.
Predictions may be reliable up to 200 or even 300 GHz.
The dipole moment was assumed to agree with that of the ground vibrational state, see e051501.cat.
NOTE: The partion function does NOT take into account hyperfine splitting and refers to the ground state only ! Vibrational contributions to the partition function are available for selected states.
Lines Listed98
Frequency / GHz<886
Max. J98
log STR0-11.0
log STR1-8.0
Isotope Corr.0.0
Egy / cm–12274.00
 µa / D3.732
 µb / D 
 µc / D 
 A / MHz 
 B / MHz4527.495
 C / MHz 
 Q(300.0)1374.9098
 Q(225.0)1031.1809
 Q(150.0)687.5086
 Q(75.00)343.8929
 Q(37.50)172.1063
 Q(18.75)86.2186
 Q(9.375)43.2767
detected in ISM/CSMno

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