Analysis of the ν 3 , ν 6 , ν 7 + ν 8 Fermi and Coriolis interacting band system in methyl cyanide
1971; Taylor & Francis; Volume: 20; Issue: 4 Linguagem: Inglês
10.1080/00268977100100641
ISSN1362-3028
AutoresJ.L. Duncan, David Ellis, I.J. Wright,
Tópico(s)Spectroscopy and Laser Applications
ResumoA reinvestigation of the Fermi and Coriolis interacting band system ν 3, ν 6, ν 7 + ν 8 of methyl cyanide has been performed with a resolution better than 0·3 cm-1. The observed J structure in some of the K sub-bands enables an unambiguous numbering of the sub-band Q branches to be made. The resulting assignment, which differs from Amat and Nielsen's previous assignment, is used to re-analyse the band system. A band contour has been calculated by computer simulation, including the effects of both the Fermi resonance of ν 6 with ν 7 + ν 8 and the Coriolis resonance of ν 6 with ν 3; both the frequency and intensity perturbations which result have been accurately reproduced. The molecular parameters obtained from our analysis are summarized in table 2.
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