CORRELATIONS OF ETHYLENIC PROTON COUPLING CONSTANTS WITH ELECTRONEGATIVITY

Abstract

A strong correlation is found between the electronegativity, Ex, and the three proton coupling constant of the vinyl group in over a hundred compounds of the type CH 2 = CHX. This correlation extends over the range Ex = 4 to 1 and over the range J gem + J cis + J trans = 14 to 50 c.p.s. Simple implications and some useful applications of this correlation are discussed.