Current Aspects of Unimolecular Reactions

Abstract
Areas of particular current interest in the field of unimolecular reactions are reviewed. New developments and experimental applications of the theory of thermal unimolecular reactions are discussed, with particular stress on simple descriptions of both the low and high-pressure limiting ranges and the intermediate fall-off. Recent experimental studies of elementary steps in unimolecular reactions after optical (one photon) and molecular beam (chemical) activation are reviewed in relation to theory. The kinetic and mechanistic aspects of the new field of unimolecular reactions induced by monochromatic infrared radiation (URIMIR, with multiphoton excitation) are developed in some detail. Experiments in this area are summarized and their role for the interpretation of URIMIR is discussed.