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Hydroxylation of substituted phenols: an ESR-study in the Ti3+/H2O2-System

✍ Scribed by K. Günther; W.G. Filby; K. Eiben

Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
165 KB
Volume
12
Category
Article
ISSN
0040-4039

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✦ Synopsis

Rydroxy-cyclohexadienyl radicals are the primary products of the attack of hydroxyl radicals 1) on aromatic compounds . The existence of these intermediates in several systems has been demonstrated by pulse radiolysis 1,2) and confirmed unambiguously by ESR-spectroscopy 3) .

Several investig@ors have intimated that the OH-radical resembles standard electrophilic reagents in many of its reactions and that it consequently shows preference for attack at positions of high electron density in aromatic rings 4) .

Thus in phenols, owing to the strong +M-effect of the OH-group, the major points of attack

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