Electron Irradiation of Hydrocarbons. II. Model System for Radical Reactions and Diffusion in Radiolysis

Abstract

Notesthe change in shielding could be attributed to hindrance to rotation about the N-CH3(B) bond owing to the increased steric interaction {vide supra).It is not possible to decide a priori whether these effects will account for the inversion in shielding constants for DMTA. Quantitative shielding calculations may be possible, based on previous calculations on amides,12 but the lack of appropriate data for the C=S bond and the possible necessity of working with non-