Thermal valence-bond isomerisation of an aromatic compound to its para-bonded form; preparation of hexakis(pentafluoroethyl)bicyclo[2,2,0]hexa-2,5-diene
Abstract
A para-bonded valence isomer (Dewar benzene)(IIb) has been prepared for the first time by pyrolysis of the corresponding aromatic compound (Ib), thus affording a ready, quantitative route to (IIb).