Studies on the Proton Magnetic Resonance Spectra in Aliphatic Systems. II. On the Inductive and Electric Field Effect of Alkyl Derivatives

Abstract

α-¹H chemical shift of alkyl derivatives is dependent mainly on the sigma- and π-electronic contributions, and the detailed discussions have proved that the former is conformed to the so-called inductive effect and the latter is substantiated from an electric field effect provided by the substituent group. And, the same result is also reliable in the ¹³C chemical shift of above series.