Determination of reactivity constants of substituted phenyl groups by means of13C NMR
1983
1.
13C chemical shifts have been measured for 3-substituted biphenyls in acetone.
2.
On the basis of correlation equations for the benzene ring, the σI and σR∘ constants have been determined for m- and p-substituted phenyl groups.
3.
Relationships have been found that can be used to estimate the σ-constants of any m- or p-substituted phenyl group, using known constants of the substituent X.
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