Infrared Absorption Spectroscopy of HNC in the Region 2.6 to 3.1 &mgr;m
The HNC molecule was generated by the reaction of translationally hot H atoms with either ClCN or BrCN. The energetically rich HNC products were probed by time-resolved infrared laser absorption spectroscopy. This allowed for the spectroscopic analysis of 16 vibrational bands in the wavelength region 2.6 to 3.1 &mgr;m and the identification of 8 new bands for HNC. The dependence of Gv, Bv, and Dv was fit to appropriate polynomials in the vibrational quantum numbers and l. No bands were identified in which the bend, nu2, and CN stretch, nu3, were simultaneously excited so that the spectroscopic constants depending on the interaction between these two vibrations could not be experimentally measured. Nevertheless, the observations of this work allow for an almost complete experimental determination of the quadratic spectroscopic constants of this simple but important molecule. Copyright 1997 Academic Press. Copyright 1997Academic Press
Northrup
FJ
Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois, 60439
Bethardy
GA
Macdonald
RG