E. Wenkert, J. Amer. Chem. Soc., BO, 5480 (1968), and references therein;(c) CR Narayanan, NR Bhadane, and MR Sarma, Tetrahedron Lett., 1561 (1968). of orientation of the plane of the aromatic ring to the dipole axis of 3b in the complex responsible for the solvent-induced shifts. Both solvents would be expected to be proximate to the positive end of the dipole. While, however, the benzene plane should be as nearly perpendicular to the ...
