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Resonance enhancement of the non-totally symmetric vibrations in the raman spectra of para-benzosemiquinone radical anion

✍ Scribed by G.N.R. Tripathi; Q. Sun; R.H. Schuler

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 360 KB
Volume: 156
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)87079-4

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✦ Synopsis

Resonance Raman spectra of p-benzosemiquinone radical anion excited in the 340-430 nm region are reported. Prominent bands, which are not present in the 430 nm spectrum, arc observed at t472 and 127 I cm-' in the 370 nm spectrum. These bands arc attributed to the non-totally symmetric (b,,) modes, vsb (CC stretch) and Ye (CH bend), respectively. These vibrations are resonance-enhancgd because of vibmnic coupling between the 370 nm ( 2Ay+2Bjs) and 315 nm (2B,.+ZBs~,) transitions.

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