THE HIGH RESOLUTION FTIR SPECTRUM OF THE $\nu_3$ FUNDAMENTAL OF THE CIS CONFORMER OF METHYL NITRITE
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Date
2006
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Ohio State University
Abstract
Methyl nitrite (CH$_3$ONO) contains a mixture of cis and trans rotational isomers. As in the $\nu_8$ and $\nu_9$ vibrations of the cis form, the $\nu_3$ vibration is not too congested, consistent with the high barrier to rotation of the methyl group in the cis form. The $\nu_3$, with an origin at 1620. cm $^{-1}$, has been assigned by previous workers to the N=O stretch of the cis conformer and hot bands are also present in this region. In this study, a spectrum taken at 0.0015 cm $^{-1}$ resolution on the PNNL IFS120/HR in a 20 cm cell was used to assign more than 300 A-type transitions of the cis $\nu_3$ between 1600 and 1650 cm $^{-1}$ and a set of excited state constants was determined.
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Author Institution: Department of Chemistry, Idaho State University, Campus Box 8023, Pocatello ID, 83209; Pacific Northwest National Laboratory, P. O. Box 999, Mail Stop K8-88, Richland, WA 99352