Anodic oxidation of hexamethoxybiphenyls into either stable cation radical salt or spiro(fluorene-9,1′-cyclohexadienones)

Article abstract of DOI:10.1016/0040-4020(96)00134-2

Three symmetrically substituted hexamethoxybiphenyls were subjected to electrooxidation at a platinum anode. 2,2′,4,4′,5,5′-hexamethoxybiphenyl led to the stable cation radical salt expected, whereas 3,3′,4,4′,5,5′-hexamethoxybiphenyl and 2,2′,3,3′,4,4′-h