The HNC molecule was generated by the reaction of translationally hot H atoms with either C1CN 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 μm and the identification of 8 new bands for HNC. The dependence of Gυ, Bυ, and Dυ was fit to appropriate polynomials in the vibrational quantum numbers and l. No bands were identified in which the bend, ν2, and CN stretch, ν3, 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.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry