Explore the intricate world of polymer science with “Active Sites of Polymerization: Multiplicity.” This comprehensive monograph, published by CRC Press, delves into the kinetic and stereospecific heterogeneity of active sites in ion, ion-coordination, and complex radical polymerization of olefins and dienes. Discover how transition metal origins, ligand environments, and catalytic system preparation influence molecular-mass distribution and stereoregularity in copolymers. The book presents various methods for assessing active site distribution, including mathematical simulations and quantum chemistry approaches, focusing on the interplay between reactivity and stereospecificity in diene polymerization. It also examines the polysite mechanism in complex radical polymerization, offering valuable insights for researchers and professionals in the field. An essential resource for understanding advanced polymerization processes.