Structure and barrier to internal rotation of 4-methylstyrene in the S0- and S1-state
β Scribed by Michael Schmitt; Christian Ratzer; Christoph Jacoby; W. Leo Meerts
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 207 KB
- Volume
- 742
- Category
- Article
- ISSN
- 0022-2860
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## Gu-abase electron diffraction stn -ttures of the four title compounds have been deterfor $-f!xoro-, 4-chIorJ-, 4,4'-difluoro-and 4.4'-dichlorohiphenyl The numbers in parentheses are one s+adard deviation as given by least-squares refinements using a dkgonal weight metris.
The laser-induced fluorescence and phosphorescence excitation spectra of 2-methylpyrazine are reported. Vibrational and methyl torsional assignments have been made. Methyl torsional parameters for the So, T, and S, electronic states have been determined from these data and are discussed in terms of