Infrared transitions of (HCN)-C-12-N-14 and (HCN)-C-12-N-15 between 500 and 10000 cm(-1)

We have measured the Fourier transform spectrum (FTS) of two isotopomers of hydrogen cyanide ((HCN)-C-12-N-14 and (HCN)-C-12-N-15) from 500 to 10 000 cm(-1). The infrared data have been combined with earlier published microwave and submillimeter-wave measurements. From this analysis new vibration-rotation energy levels and constants are given, based on the observation of a number of new vibrational levels, especially for (HCN)-C-12-N-15. Th, Coriolis interaction involving Delta v(3) = -1, Delta v(2) = 3, and Delta l = +/-1 has been observed for a great many levels and in some cases the assignments of laser transitions allowed by this interaction are more clearly shown. New vibration-rotation constants are given that allow one to predict the transition wavenumbers for most of the transitions below 10 000 cm(-1) with accuracies of about 0.5 cm(-1) or better. Values are given for the power series expansion of the l-type resonance constants and for the centrifugal distortion constants, as well as the usual vibrational and rotational constants. (C) 1996 Academic Press, Inc.