Chemical Kinetics: From Molecular Structure to Chemical Reactivity, Second Edition , explains how molecular structures change with time. It offers a comprehensive and coherent coverage of the rates of chemical transformations. The book is written for both undergraduate chemistry students, and for the specialist. The newcomer will find the fundamental concepts, the simple experiments, and the underlying theories. For the seasoned specialist, it presents sophisticated experimental and theoretical methods, offering a panorama of time-dependent molecular phenomena connected by a new rationale. The gap between the two is bridged by a logical path that leads the reader from a phenomenological approach of molecular changes, to the formalism of chemical reaction rates, and then to state-of-the-art calculations of rate constants of the most prevalent reactions: atom transfers, catalysis, proton transfers, substitution reactions, energy transfers and electron transfers. In the process, the reader is presented with the details of collision and transition state theories. The coverage includes unimolecular reactions in the gas phase, reactions in solution and reactions on surfaces.