Arene Radical Cations Research Articles

Radical Cation Salts - A New Family of Organic Metals

Abstract Stable radical cations of arenes can be generated by anodic oxidation and can be separated at the anode in the presence of suitable anions as radical cation salts [ary12]†X in the form of shiny black crystals. Crystal structures and phase transitions in fluoranthenyl radical cation salts, a new family of organic conductors, are reported. The metal to semiconductor transition which is observed seems to be related to a distortion of the stacks of aromatic molecules perpendicular to the stacking direction.

Electron spin resonance study of the generation of stable arene radical cations in molten antimony trichloride

Pure molten antimony trichloride has been found to act as an oxidizing agent toward polycyclic arenes, producing stable solutions of radical cations. The oxidizing power of the Sb/sup 3 +//Sb/sup 0/ couple has been shown to be considerably increased or decreased by the addition, respectively, of a few mole percent of a chloride ion acceptor (AlCl/sub 3/) or donor (Me/sub 4/NCl). ESR spectra and coupling constants are reported for several arene radical cations in this medium, including those for the previously unreported acenaphthene radical cation.

Langlebige Radikalkationen und anodische Substitution einfacher Aromaten / Long-lived Radical Cations and Anodic Substitution of Simple Arenes

Abstract In media of low nucleophilicity solutions of coloured radical cations of simple arenes can be obtained by anodic oxidation. A straightforward mechanism for the nucleophilic substitution of these species is suggested by the experimental results.