A central core of theoretical and experimental physical chemistry is covered by this book, which looks at energy selected reactions. Three major aspects of unimolecular reactions are covered: the preparation of the reactants in selected energy states; the rate of dissipation of the activated molecule; and the partitioning of the excess energy among the final products. Theoretical and analytical chemists working in research laboratories will find the coverage of both theoretical and practical aspects of the topic invaluable for furthering their work.