Rotational isomerism—XVI: The AA′BB′X NMR spectrum and rotational isomerism of 2‐fluoroethyl trichloroacetate

Abstract
The complete AA′BB′X analysis of the 1H and 19F NMR spectrum of CH2F.CH2OCO·CCl3 (1) as a neat liquid and in various solvents is given and considered in detail. The differentiation of the two conjugate solutions is obtained both from the X spectrum and by analysis at two field strengths. The coupling constants obtained show that the compound exists almost entirely in the gauche rotamer in all solvents.