Correlation of the energies of π-bonds between carbon and other elements with e.s.r. hyperfine coupling constants

Abstract

A linear correlation is found between CA π-bond energies in compounds of the type H₂CAR_n(or HCAR_n–1) and β-proton hyperfine coupling constants for the corresponding radicals H₃C–ȦR_n(or H₂CAR_n-1): an empirical method is therefore available for either estimating π-bond energies from e.s.r. data or predicting hyperfine coupling constants from bond energy data.