Substituent effects on benzyl radical hyperfine coupling constants. Part 2. The effect of sulphur substituents
- 1 June 1984
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 62 (6) , 1164-1168
- https://doi.org/10.1139/v84-190
Abstract
Several 4-substituted benzyl radicals of the general form R(On)SC6H4CH2•(n = 0, 1, 2; R = Me, Ph, Tol, COCH3 OCH3) have been investigated by electron spin resonance (esr) spectroscopy. In general, the ability to delocalize spin density onto the substituent decreases as n increases. The effect of R on the spin density depends on the oxidation state of the sulphur. These trends are explained by considering the sulphur to be either a spin donor or a spin acceptor, depending on the oxidation state. The σ•α values are determined.Keywords
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