VIBRATION ROTATION INTERACTIONS IN $C_{2}H_{2}$, $C_{2}D_{2}$ AND $C_{2}HD$
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Date
1972
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Publisher
Ohio State University
Abstract
During recent years nearly 150 infrared bands of $C_{2}H_{2}$, $C_{2}D_{2}$ and $C_{2}HD$ have been recorded with high resolution vacuum spectrographs. The molecular constants of the levels involved in the transitions revealed many finer details pertaining to the effects of vibration rotation interactions. A comparison of the nature of the perturbations in these three isotopic species of acetylene makes an interesting study. The experimental data established in general that in the $\Delta$ states the c levels lie above the d levels when the $\Sigma^{+}$ component is below the $\Delta$ component whereas in the $\Pi$ states $\Pi_{d}$ is higher than $\Pi_{C}. ^{*}$ An exception to this has been found for the $\Pi$ state (00112)$^{1}$ of $C_{2}H_{2}$ where the c component seems to lie above the corresponding d component.
Description
$^{*}$The c and d nomenclature of $\ell$-type doublets follows the convention that for J even, the + level is called c and the - level d.""
Author Institution: Department of Physics, The Ohio State University; Laboratorio del C.N.R. dei Composti del Carbonio Contenenti Eteroatomi, Ozzano Emilia and Istituti di Chimica Organica dell' Universit\'{a} di Bologna e
Author Institution: Department of Physics, The Ohio State University; Laboratorio del C.N.R. dei Composti del Carbonio Contenenti Eteroatomi, Ozzano Emilia and Istituti di Chimica Organica dell' Universit\'{a} di Bologna e