With an increased focus on fundamentals, this new edition of A Textbook of Organic Chemistry continues to present the time-tested functional group approach to the subject. This examination-oriented book breaks the intricacies of Organic Chemistry into easy-to-understand steps which gives the student the necessary foundation to build upon, learn, and understand Organic Chemistry in a way that is efficient as well as long-lasting.

For B.Sc. I year students. Matter on inclusion compounds, charge transfer complexes and clatherates in chapter 1 of organic chemistry has been rewritten to cover them thoroughly. A new chapter Thermodynamics -I containing first law of thermodynamics and thermochemistry, which forms a part of syllabus for B.Sc.-I year in some universities.

An advanced-level textbook of organic chemistry for the graduate (B.Sc) and postgraduate (M.Sc) students of Indian and foreign universities. This book is a part of the four-volume series, entitled “A Textbook of Organic Chemistry – Volume I, II, III, IV”. CONTENTS: CHAPTER 1. Nature of Bonding in Organic molecules: Delocalized Chemical Bonding; Conjugation; Cross Conjugation; Resonance; Hyperconjugation; Tautomerism; Aromaticity in Benzenoid and Nonbenzenoid Compounds; Alternant and Non-Alternant Hydrocarbons; Huckel’s Rule: Energy Level of p-Molecular Orbitals; Annulenes; Antiaromaticity; Homo-Aromaticity; PMO Approach; Bonds Weaker than Covalent; Addition Compounds: Crown Ether Complexes and Cryptands, Inclusion Compounds, Cyclodextrins; Catenanes and Rotaxanes CHAPTER 2. Stereochemistry: Chirality; Elements of symmetry; Molecules with more than one chiral centre: diastereomerism; Determination of relative and absolute configuration (octant rule excluded) with special reference to lactic acid, alanine & mandelic acid; Methods of resolution; Optical purity; Prochirality; Enantiotopic and diastereotopic atoms, groups and faces; Asymmetric synthesis: cram’s rule and its modifications, prelog’s rule; Conformational analysis of cycloalkanes (upto six membered rings); Decalins; Conformations of sugars; Optical activity in absence of chiral carbon (biphenyls, allenes and spiranes); Chirality due to helical shape; Geometrical isomerism in alkenes and oximes; Methods of determining the configuration CHAPTER 3. Reaction Mechanism: Structure and Reactivity: Types of mechanisms; Types of reactions; Thermodynamic and kinetic requirements; Kinetic and thermodynamic control; Hammond’s postulate; Curtin-Hammett principle; Potential energy diagrams: Transition states and intermediates; Methods of determining mechanisms; Isotope effects; Hard and soft acids and bases; Generation, structure, stability and reactivity of carbocations, carbanions, free radicals, carbenes and nitrenes; Effect of structure on reactivity; The Hammett equation and linear free energy relationship; Substituent and reaction constants; Taft equation CHAPTER 4. Carbohydrates: Types of naturally occurring sugars; Deoxy sugars; Amino sugars; Branch chain sugars; General methods of determination of structure and ring size of sugars with particular reference to maltose, lactose, sucrose, starch and cellulose. CHAPTER 5. Natural and Synthetic Dyes: Various classes of synthetic dyes including heterocyclic dyes; Interaction between dyes and fibers; Structure elucidation of indigo and Alizarin CHAPTER 6. Aliphatic Nucleophilic Substtitution: The SN2, SN1, mixed SN1 and SN2, SNi , SN1’, SN2’, SNi’ and SET mechanisms; The neighbouring group mechanisms; neighbouring group participation by p and s bonds; anchimeric assistance; Classical and nonclassical carbocations; Phenonium ions; Common carbocation rearrangements; Applications of NMR spectroscopy in the detection of carbocations; Reactivity- effects of substrate structure, attacking nucleophile, leaving group and reaction medium; Ambident nucleophiles and regioselectivity; Phase transfer catalysis. CHAPTER 7. Aliphatic Electrophilic Substitution: Bimolecular mechanisms – SE2 and SEi; The SE1 mechanism; Electrophilic substitution accompained by double bond shifts; Effect of substrates, leaving group and the solvent polarity on the reactivity CHAPTER 8. Aromatic Electrophilic Substitution: The arenium ion: mechanism, orientation and reactivity, energy profile diagrams; The ortho/para ratio, ipso attack, orientation in other ring systems; Quantitative treatment of reactivity in substrates and electrophiles; Diazonium coupling; Vilsmeir reaction; Gattermann-Koch reaction CHAPTER 9. Aromatic Nucleophilic Substitution: The ArSN1, ArSN2, Benzyne and SRN1 mechanisms; Reactivity – effect of substrate structure, leaving group and attacking nucleophile; The von Richter, Sommelet-Hauser, and Smiles rearrangements CHAPTER 10. Elimination Reactions: The E2, E1 and E1cB mechanisms; Orientation of the double bond; Reactivity –effects of substrate structures, attacking base, the leaving group and the medium; Mechanism and orientation in pyrolytic elimination CHAPTER 11. Addition to Carbon-Carbon Multiple Bonds: Mechanistic and stereochemical aspects of addition reactions involving electrophiles, nucleophiles and free radicals; Regio–and chemoselectivity: orientation and reactivity; Addition to cyclopropane ring; Hydrogenation of double and triple bonds; Hydrogenation of aromatic rings; Hydroboration; Michael reaction; Sharpless asymmetric epoxidation. CHAPTER 12. Addition to Carbon-Hetero Multiple Bonds: Mechanism of metal hydride reduction of saturated and unsaturated carbonyl compounds, acids, esters and nitriles; Addition of Grignard reagents, organozinc and organolithium; Reagents to carbonyl and unsaturated carbonyl compounds; Wittig reaction; Mechanism of condensation reactions involving enolates – Aldol, Knoevenagel, Claisen, Mannich, Benzoin, Perkin and Stobbe reactions; Hydrolysis of esters and amides; Ammonolysis of esters.

This textbook has been designed to meet the needs of B.Sc. First Semester students of Chemistry as per the new UGC Model Curriculum - Choice Based Credit System (CBCS). With its traditional approach to the subject, this textbook lucidly explains principles of chemistry. Important topics such as atomic structure, chemical bonding, molecular structure, fundamentals of organic chemistry, stereochemistry and aliphatic hydrocarbons are aptly discussed to give an overview of inorganic and organic chemistry. Laboratory work has also been included to help students achieve solid conceptual understanding and learn experimental procedures.

This book covers nearly all topics in Organic Chemistry taught upto the B.Sc. level. Topics like resonance, H-bond, hybridization, IUPAC nomenclature, acid-base theory of organic compounds, stereochemistry, structure reactivity relationship and spectroscopy have been introduced early in the book. Subsequent chapters deal with synthetic polymers, aliphatic and aromatic hydrocarbons, alcohols and phenols, ethers, aldehydes, carboxylic acids and their derivatives, amines, carbohydrates, organometallics and terpenes. These topics have been discussed in-depth and in a comprehensive manner. A great deal of attention has been focussed on chemical reactions and their mechanisms. The scope and limitations of the reactions have been stated. Certain topics of general interest namely C.N.G., L.P.G., simple drugs, DNA finger printing, PUFA, trans fatty acids, soaps and detergents, pesticides, industrial alcohols, coal tar, octane number, chromatography, and artificial sweeteners have been highlighted at appropriate places. Also included are approximately 900 in-text and end-of-the-chapter problems, and a set of Multiple Choice Questions (MCQ) at the end of each chapter. A glossary of important terms is also included. This book has been designed as a comprehensive textbook for students upto B.Sc. level. In addition, the book will be immensely useful for those preparing for competitive examinations like I.I.T., AIEEE, medical entrance and others.