The stable radical cation of thiophene annelated with bicyclo[2.2.2]octene and its reaction with triplet oxygen to give a protonated cation of 2-butene-1,4-dione derivative.
The first isolable salt of the thiophene radical cation was prepared from the derivative annelated with two bicyclo[2.2.2]octene units, and its reaction with triplet oxygen was found to give a novel cation of a proton-chelating 2-butene-1,4-dione derivative with remarkable stability.
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Atsushi
A
Wakamiya
Tohru
T
Nishinaga
Koichi
K
Komatsu