I 9 ) , acetylene (20), and ethene (21-23). However, in larger hydrocarbons such as allene and propyne (24), butenes through hexenes (25, 26), and styrene (29, the reactions proceed with less randomization. The differences observed here seem to point to a unique complex in the reactions of the 1,3-butadiene radical cation and isomeric C5H1~'s. Labelling studies as well as studies with other isomeric compounds (19) F. P. Abramson and J. H. Futrell,
Infrared and Raman spectra have been obtained over the region 4000 cm−1 to 33 cm−1 on ortho-and meta-substituted styrenes including F, Br, Cl, methyl, and meta-nitro derivatives. The entire spectral region has been investigated in the liquid state while selected regions and isomers have been studied in the solid and gas phase. Gas phase and interferometric spectra in the far ir of ortho-and meta-fluorostyrene did not reveal the torsional modes. Assignment of most fundamental modes of vibrations are reported and discussed.
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