The present advanced text-cum-reference book is designed not only for advanced undergraduate and graduate students, but also for academic and industrial researchers who work with heterocyclic compounds. It presents a comprehensive account of the syntheses, reactions, properties and applications of all the most significant classes of heterocyclic compounds. Heterocyclic Chemistry has been organised in three volumes. This second volume contains six chapters: Introduction, Five-Membered Heterocycles with One Heteroatom, Benzo-Fused Five-Membered Heterocycles with One Heteroatom, Five-Membered Heterocycles with Two Heteroatoms, Five-Membered Heterocycles with More Than Two Heteroatoms, and Meso-Ionic Heterocycles. Recent developments in heterocyclic chemistry are emphasized.Each chapter starts with the principles of structure and reactivity for the compound class in question, followed by a detailed treatment of synthesis, structure and reactions for the individual members of that class. The subject is illustrated with a large number of figures and schemes. This book is an essential tool for advanced students and for academic and industrial researchers in organic, medicinal, pharmaceutical, dye and agricultural chemistry.