Conformations of Bridged Diphenyls. IV. Diphenyl Ether Conformations and Proton Chemical Shifts

Abstract

The conformationally dependent chemical shifts for the ring protons of some diphenyl ethers can be explained approximately by the ring-current model for benzene magnetic anisotropy. Although the model underestimates the shielding in the region above the plane of the ring it is the best of the models investigated for this purpose.