SPIN CATALYSIS - DYNAMICS OF 3-SPIN SYSTEMS

The kinetic theory of a new phenomenon, spin catalysis, has been devel oped. This phenomenon takes place in three-spin systems, when the thir d radical (or a paramagnetic ion) induces spin conversion in the pair, removes spin forbiddance, and thus changes the reactivity of the firs t two radicals. Kinetic equations for yields of spin catalyzed reactio ns have been derived. Conditions for spin catalysis, values of the cat alytic effect, and the kinetic behavior are discussed. A new kind of q uantum beats in chemical reactions is predicted.