Generation of the 1,4-diphenylcyclohexane-1,4-diyl radical cation by CeIV-catalysed denitrogenation of the azoalkane 1,4-diphenyl-2,3-diazabicyclo[2.2.2]oct-2-ene and its reluctance to undergo Cope rearrangement
Abstract
It is experimentally confirmed that the radical cation of 1,4-diphenylcyclohexane-1,4-diyl does not isomerize thermally to the radical cation of 2,5-diphenylhexa-1,5-diene, but is instead quantitatively dehydrogenated to p-terphenyl.