Abstract
Abstract77Se N.m.r. spectra of 4,4′‐disubstituted diphenyl selenides have been obtained. The chemical shifts could be correlated with substituent constants of the Hammett type or with Swain and Lupton two‐parameter equations. No correlations were observed between these 77Se shifts and the 13C shifts of the CH2 group of 4,4′‐disubstituted diphenylmethanes, the latter shifts showing no correlation with substituent constants. On the other hand linear correlation was observed between the 77Se shifts of the 4,4′‐disubstituted diphenyl selenides and the 1H shifts of the CH2 group of the diphenylmethanes, the 13C shifts of their 1‐carbons and the 19F shifts of 4‐substituted fluorobenzenes.
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