Free radicals, which are key intermediates in many thermal, photochemical and radiation processes, are important for a proper understanding of fundamental natural processes and the successful development of organic syntheses. Volume II/18 serves as supplement and extension to Volume II/13 and covers rate constants and other kinetic data of free radical reactions in liquids. II/18 contains new chapters on reactions of radicals in excited states and of carbenes, nitrenes and analogues. Species in aqueous solutions for which other compilations are available were...