Chemistry Letters, Vol.32, No.11, 1020-1021, 2003
ESR detection of the isotopic-site-preference in the Jahn-Teller distorted benzene cation radicals produced in MCM-41, silica gel, and halocarbons
Isotopic-site-preference was detected in partially-deuterated benzene cation radicals, which were distorted by the Jahn-Teller effect to the D-2h symmetry. In all cases, C-H bonds tend to occupy the positions with higher spin densities in the distorted cation.