Substituent effects on benzyl radical hyperfine coupling constants. Part 2. The effect of sulphur substituents
Keyword(s):
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.
1980 ◽
Vol 102
(16)
◽
pp. 5202-5207
◽
1973 ◽
Vol 28
(3-4)
◽
pp. 104-106
◽
Keyword(s):