Generation of bicyclo[3.2.0]hept-6-ene-2,4-diyl radical cations by chemical electron transfer (CET) with trisarylaminium salts and intramolecular cyclobutene trapping as an alternative entry to the quadricyclane-norbornadiene valence isomers

Article abstract of DOI:10.1021/ja00143a012

For the first time, chemical electron transfer (CET) studies have been conducted for the tricyclo[3.2.0.0^2,4]-hept-6-enes 2 and the quadrieyclanes 3 in solution. The 2,4-dimethyl-substituted bicyclo[3.2.0]hept-6-ene-2,4-diyl radical cation 2a