Site lifetime temperature variations in intermolecular exchange processes characterized by a two-term rate law

Abstract

The temperature dependence of the site lifetimes, t_A and t_B, characterizing the intermolecular exchange of X between sites A and B through simultaneous first-order and second-order processes as expressed in the rate law

1/t_A = X_B/X_At_B = k₁ + k₂[B]

and the treatment of such data determined by nuclear magnetic resonance spectroscopy are discussed.