The Millimeter-Wave Rotational Spectrum of 2-Chloroacrylonitrile

✍ Scribed by Z. Kisiel; L. Pszczolkowski

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 483 KB
• Volume: 166
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1169

✦ Synopsis

The mm-wave rotational spectrum of 2-chloroacrylonitrile, (\mathrm{H}{2} \mathrm{C}-\mathrm{CCICN}), was measured in the frequency region (160-350 \mathrm{GHz}) with a (\mathrm{mm})-wave BWO spectrometer. The spectrum is dominated by prominent oblate-type bands consisting of overlaps of low- (K{-1}{ }^{a} R) - and ({ }^{b} R)-type transitions. Extensive assignments and frequency measurements were made for the ground states of the two chlorine isotopic species and for the four lowest lying vibrational states in (\mathrm{H}{2} \mathrm{C}=\mathrm{C}^{33} \mathrm{ClCN}), associated with the (\nu{11}) and (\nu_{15} \mathrm{CC} \equiv \mathrm{N}) bending and (\nu_{10} \mathrm{CClC} \equiv \mathrm{N}) rocking motions. Accurate spectroscopic constants have been determined for all these states, and the (\mathrm{CC} \equiv \mathrm{N}) bending states are found to be less coupled than those in the parent acrylonitrile molecule. 1994 Academic Press, Inc