Study the essentials of organic chemistry efficiently! This e-book for bachelor and master students facilitates effective learning and is renowned for the quality of its content: 85 short chapters present each topic concisely, including questions for self-examination. Based on the author's long teaching experience, this book has been developed from lecture scripts of courses held in the USA and in Germany. It comprises the molecular orbital model to explain covalent bonding in organic molecules, the classes of organic compounds including natural products, polymers and biopolymers, basic concepts (orbital hybridization, resonance, aromaticity), types and mechanisms of organic reactions, and essential aspects of molecular structure such as atom connectivities, skeletal isomerism, conformation, configuration and chirality. The updated 2nd edition includes 4 new chapters on Selectivity and Specificity of Organic Reactions, Planning Organic Syntheses, Carbon-13 NMR, and two-dimensional NMR.