ESR study of radical cations from γ-irradiation of bicyclo[3.1.0]hex-2-ene in freon matrices
Bicyclo[3.1.0]hex-2-ene radical cation, generated by γ-irradiation of the parent compounds in freon matrices at 77 K, undergoes ring opening to the 1,3-cyclohexadiene radical cation, In CF2ClCFCl2 matrix both radical cations also undergo deprotonation to the corresponding neutral radicals.
Faucitano,Buttafava,Martinotti,Sustmann,Korth
p. 2223 - 2226
(2007/10/02)
The gas-phase elimination reaction of 3-methoxycyclohexene: Regiochemistry
Gas-phase elimination reactions of deuterium labeled 3-methoxycyclohexenes have been investigated. 1,4-Elimination is heavily favored over 1,2-elimination when strong bases such as hydroxide and amide are used. The 1,2-pathway becomes more competitive when weaker bases such as methoxide are employed, and the mechanism shifts from E1 cB to E2.
Rabasco, John J.,Kass, Steven R.
p. 4077 - 4080
(2007/10/02)
Photochemical Rearrangements of C6H8, C7H10, and C8H12 Radical Cations in Solid Argon at 20 K
C6H8 radical cations have been produced by matrix photoionization techniques and trapped in solid argon.Electronic spectra show that two different types of products are formed; a conjugated diene cation with strong and weak absorption between 30000 and 20000 cm-1 and conjugated triene cations with a strong absorption between 28000 and 22000 cm-1 and weak absorptions between 18000 and 14000 cm-1.With selective photolysis in the high-energy bands, the conjugated triene cation geometric isomers were interconverted while the cyclic diene cations were ring opened to give conjugated triene cations.Similar experiments with cyclic and bicyclic C7H10 cations gave three conjugated heptatriene cation conformers, and cyclic C8H12 cations yielded a number of conjugated octatriene cation isomers.