Abstract
AbstractRelative gas‐phase acidities of para‐substituted phenols (1, Sub—C6H4—OH) and their ω‐substituted para‐alkylphenol analogs [2, Sub—(CH2)n—C6H4—OH] were calculated at the B3LYP/6–31+G* and AM1 levels of theory. The acidity of a substituted molecule of 2 is compared with that of the unsubstituted molecule of 2 to determine the field/inductive effect of the substituent on the acidity of 2. This field/inductive effect was extrapolated to n = 0, yielding the field/inductive effect of the substituent on the acidity of 1. The derived field/inductive effect in 1 was subtracted from the difference in acidity between 1 and phenol in order to determine the resonance effect of the substituent on the acidity of 1. Our results are compared with the field/inductive and resonance substituent parameters empirically derived from previous experimental solution studies. Copyright © 2004 John Wiley & Sons, Ltd.
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