Abstract Kinetic studies on the reversible reactions of benzyl bromides with N, N- dimethylanilines were carried out for both the forward (kf) and reverse (kr) directions. The equilibrium constants, K were calculated using the ratio kf/kr and the equilibrium cross- interaction constant, ρ e XY was determined. The ρ e XY value was shown to represent a maximum intensity of interactions between substituents X and Y through covalent bonds ...