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- Title
The ν<sub>3</sub> − ν<sub>4</sub> difference band contribution to the CCl<sub>4</sub> symmetric stretch (ν<sub>1</sub>) mode.
- Authors
Gaynor, James D.; Wetterer, Anna M.; Valente, Edward J.; Mayer, Steven G.
- Abstract
The Raman spectrum of the symmetric stretching vibration (ν1) of liquid carbon tetrachloride observed at 295 K and reported repeatedly over the last 80 years clearly shows four of the five more abundant isotopomers at 440-470 cm−1. At the lower energy end of this spectrum, additional intensity due to isotopomeric contributions from the symmetric stretch for v = 1 → 2 (hotbands) partially overlaps the prominent v = 0 → 1 features, and accounts for about 18% of the integrated intensity at 295 K in agreement with theory. When these two patterns are modeled and subtracted from the experimental spectrum, a feature underlying almost exactly the C35Cl4 (v = 0 → 1) band at 462.5 cm−1 becomes apparent. We propose that this feature is the ν3 − ν4 difference band. Observations at lower temperatures, and of the combination bands, and the polarized Raman spectra are consistent with this hypothesis. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
CARBON tetrachloride; CARBON compounds spectra; CHEMICAL synthesis; CARBON compounds; RAMAN spectra; ISOMERISM
- Publication
Journal of Raman Spectroscopy, 2015, Vol 46, Issue 1, p189
- ISSN
0377-0486
- Publication type
Article
- DOI
10.1002/jrs.4625