We have incorporated two chapters on stereochemistry. While the first chapter deals with the basic concepts of chirality, the second describes stereoheterotopic ligands and faces, stereoselective and stereospecific reactions, asymmetric synthesis, effect of conformation on reactivity and finally conformational analysis of monosaccharides.

Chemistry of carbocations has received special attention. Neighbouring group participation of a lone pair, a double bond, and a phenyl group along with a discussion of sigma bond participation and nonclassical cations are dealt at length. Topics such as photochemistry of aromatic compounds, cheletropic reactions, hydrogenation of unsaturated systems, ambident nucleophiles, Hammette equation and Taft equation have been introduced in appropriate chapters. A large number of energy profile diagrams are sketched in many chapters to illustrate different processes, and many synthetically imported reactions and rearrangements have added in chapters dealing with aromatic electrophilic and nucleophilis substitutions.