Index: Kelly, David P.; Banwell, Martin G.; Ryan, John H.; Phyland, James R.; Quick, Jason R. Journal of Organic Chemistry, 1995 , vol. 60, # 6 p. 1651 - 1657
The AJ equation (11, correlates the difference in one bond W-'H coupling constants of groups adjacent (a) to the cationic center and those in neutral model compounds (usually ketones) to the dihedral angle (8) between the CH bond and the vacant pn orbital. This equation has been used in various studies concerned with determining the structure of acyclic, cyclic, bicyclic, and nonclassical cation^.^,^
