Reaction of some triarylmethyl radicals, polyarylalkenes, and 9,10-dihydro-9,10-epidioxyanthracenes with sulphur dioxide; detection of radicals and/or cations derived from the corresponding cation radicals

Abstract

The reactions of some triarylmethyl radicals, polyarylalkenes, and 9,10-dihydro-9,10-epidioxyanthrancene derivatives with sulphur dioxide have been investigated. In these reactions radicals and/or cations, possibly derived from the corresponding cation radicals, were detected by e.s.r. and u.v. spectroscopy. In the reactions of 9,10-dihydro-9,10-epidioxyanthracene derivatives with conc. sulphuric acid or antimony pentachloride, cation radicals of the anthracene derivatives were detected. Oxidation of stable radicals with sulphur dioxide was also investigated.