ROTATION VIBRATION SPECTRUM OF HCN
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Date
1959
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
More than 40 bands of the HCN molecule are available for performing the vibrational analysis. About 20 of these bands in the $1.1 \mu$ to $3.0 \mu$ region some of which have been observed for the first time, have been measured or remeasured. Q branches for most of the perpendicular bands have been resolved, allowing a precise determination of the band origins. It has been necessary to make use of the ten $Y_{ilk}$ coefficients to perform a satisfactory vibrational analysis. A number of cases of Fermi resonance have been observed. Several of these perturbations can be calculated from the observed anomalous B values. The B values have shown that it is necessary to introduce the six $\gamma$ terms into the expression for $B_{e}$. More than a dozen $HC^{13}$N bands have been observed and measured. It has been possible to obtain a very precise frequency for the fundamental band $(01^{1}-000)$ by application of the Ritz Combination principle to the near infrared harmonic bands. Five independent determinations of this band frequency have been obtained for $HC^{12}N$ and three for $HC^{13}N$.
Description
$^{*}$ These research was assisted by support from Contract Nour-656(12) NR 019-401 of the office Naval Research.
Author Institution: The Pennsylvania State University
Author Institution: The Pennsylvania State University