Knowledge Bank

A single kinetic model is developed for individual reaction steps in a molecular reaction. Examined here are cases where the spin multiplicity of the system changes in the step. Several extreme kinetic cases are discussed in connection with their measurement by pulsed ESR and the example of an application to the formation rates of triplet diphenylmethylene is given. The connection is made between measured rates and the nonzero Interaction matrix elements between the initial and final states and is applied to the example of diphenylmethylene molecular relaxation in the reaction.