T. Keszthelyi et R. Wilbrandt, RADICAL CATIONS OF MONOMETHYL-SUBSTITUTED 1,3-BUTADIENES - RESONANCE RAMAN-SPECTRA AND MOLECULAR-ORBITAL CALCULATIONS, Journal of physical chemistry, 100(39), 1996, pp. 15785-15793
The resonance Raman spectra of the trans- and cis-1,3-pentadiene and t
he 2-methyl-1,3-butadiene (isoprene) radical cations generated by gamm
a-irradiation in a Freon glass are reported. The spectra are excited i
n resonance with the first absorption band. The spectra, which are int
erpreted with the help of density functional theory calculations, indi
cate the presence of both the s-trans and the s-cis rotamers of all th
ree radical cations.