Comparative theoretical and experimental analysis of hydrocarbon σ-radical cations
作者:A. A. Novikovskii、P. A. Gunchenko、P. G. Prikhodchenko、Yu. A. Serguchev、P. R. Schreiner、A. A. Fokin
DOI:10.1134/s1070428011090053
日期:2011.9
The structures of sigma-radical cations formed by ionization of adamantane, twistane, noradamantane, cubane, 2,4-dehydroadamantane, and protoadamantane were optimized at the B3LYP, B3LYP-D, M06-2X, B3PW91, and MP2 levels of theory using 6-31G(d), 6-311+G(d,p), 6-311+G(3df,2p), cc-PVDZ, and cc-PVTZ basis sets. On the whole, single-configuration approximations consistently describe the structure and transformations of the examined sigma-radical cations. The best correlations (r = 0.97-0.98) between the calculated adiabatic ionization potentials and experimental oxidation (anodic) potentials of hydrocarbons were obtained in terms of B3PW91 approximation.