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Organic Chemistry

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Organic Chemistry

Welcome to organic chemistry! This text has been written for students. It emphasizes the practical details and skills needed to master this challenging subject. Learning organic chemistry is brain yoga! Our brains become strong and flexible with practice.

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  1. 01: Introduction and Review
  2. 1.01: The Origins of Organic Chemistry
  3. 1.02: Principles of Atomic Structure (Review)
  4. 1.03: Electronic Structure (Review)
  5. 1.04: Electron Configurations
  6. 1.05: Octet Rule - Ionic and Covalent Bonding (Review)
  7. 1.06: Lewis Structures
  8. 1.07: Common Bonding Patterns for Organic Chemistry
  9. 1.08: Structural Formulas - Lewis Kekule Bond-line Condensed
  10. 1.09: Electronegativity and Bond Polarity (Review)
  11. 1.10: Resonance
  12. 1.11: Arrhenius Acids and Bases (Review)
  13. 1.12: Brnsted-Lowry Acids and Bases (Review)
  14. 1.13: Lewis Acids and Bases
  15. 1.14: Distinguishing between pH and pKa
  16. 1.15: Predicting Relative Acidity
  17. 1.16: Molecular Formulas and Empirical Formulas (Review)
  18. 1.17: Additional Exercises
  19. 1.18: Solutions to Additional Exercises
  20. 02: Structure and Properties of Organic Molecules
  21. 2.01: Pearls of Wisdom
  22. 2.02: Molecular Orbital (MO) Theory (Review)
  23. 2.03: Hybridization and Molecular Shapes (Review)
  24. 2.04: 2.4 Conjugated Pi Bond Systems
  25. 2.05: Lone Pair Electrons and Bonding Theories
  26. 2.06: Bond Rotation
  27. 2.07: Isomerism Introduction
  28. 2.08: Hydrocarbons
  29. 2.09: Organic Functional Groups
  30. 2.10: Intermolecular Forces (IMFs) - Review
  31. 2.11: Intermolecular Forces
  32. 2.12: Intermolecular Forces
  33. 2.13: Additional Practice Problems
  34. 2.14: Organic Functional Groups: H-bond donors
  35. 2.15: Additional Exercises
  36. 2.16: 2.15 Solutions to Additional Exercises
  37. 03: Structure and Stereochemistry of Alkanes
  38. 3.01: Hydrocarbon Functional Groups
  39. 3.02: Physical Properties of Alkanes
  40. 3.03: Structure and Conformations of Alkanes
  41. 3.04: Conformations of Butane
  42. 3.05: Conformations of Higher Alkanes
  43. 3.06: Cycloalkanes and Ring Strain
  44. 3.07: Cyclohexane Conformations
  45. 3.08: Conformations of Monosubstituted Cyclohexanes
  46. 3.09: Cis-trans Isomerism in Cycloalkanes
  47. 3.10: Conformations of Disubstituted Cyclohexanes
  48. 3.11: Joined Rings
  49. 3.12: Uses and Sources of Alkanes
  50. 3.13: Reactions of Alkanes - a Brief Overview
  51. 3.14: Additional Exercises
  52. 3.15: Solutions to Additional Exercises
  53. 04: Stereochemistry at Tetrahedral Centers
  54. 4.01: Chirality
  55. 4.02: Fischer Projections to communicate Chirality
  56. 4.03: Absolute Configuration and the (R) and (S) System
  57. 4.04: Diastereomers - more than one chiral center
  58. 4.05: Meso Compounds
  59. 4.06: Isomerism Summary Diagram
  60. 4.07: Optical Activity and Racemic Mixtures
  61. 4.08: 6.8 Resolution (Separation) of Enantiomers
  62. 4.09: Stereochemistry of Molecules with Three or More Asymmetric Carbons
  63. 4.10: Absolute and Relative Configuration - the distinction
  64. 4.11: Chirality at Nitrogen, Phosphorus, and Sulfur
  65. 4.12: Biochemistry of Enantiomers
  66. 4.13: 6.13 The Discovery of Enantiomers
  67. 4.14: Additional Exercises
  68. 4.15: Solutions to Additional Exercises
  69. 05: An Introduction to Organic Reactions using Free Radical Halogenation of Alkanes
  70. 5.01: Types of Organic Reactions
  71. 5.02: 5.2 Reaction Mechanism Notation and Symbols
  72. 5.03: the Dance of the Nucleophile and Electrophile
  73. 5.04: Describing a Reaction - Equilibrium and Free Energy Changes
  74. 5.05: Homolytic Cleavage and Bond Dissociation Energies
  75. 5.06: Reaction Energy Diagrams and Transition States
  76. 5.07: 5.7 Reactive Intermediates - Carbocations
  77. 5.08: 5.8 Reactive Intermediates - Radicals
  78. 5.09: Reactive Intermediates: Carbanions and Carbon Acids
  79. 5.10: The Free-Radical Halogenation of Alkanes
  80. 5.11: Reactivity and Selectivity
  81. 5.12: A Comparison between Biological Reactions and Laboratory Reactions
  82. 5.13: Additional Exercises
  83. 5.14: Solutions to Additional Exercises
  84. 06: Alkyl Halides: Nucleophilic Substitution and Elimination
  85. 6.01: 7.1 Alkyl Halides - Structure and Physical Properties
  86. 6.02: Common Uses of Alkyl Halides
  87. 6.03: Preparation of Alkyl Halides
  88. 6.04: Reactions of Alkyl Halides: Substitution and Elimination
  89. 6.05: The Sₙ2 Reaction
  90. 6.06: Characteristics of the Sₙ2 Reaction
  91. 6.07: Stereochemistry of the SN2 Reaction
  92. 6.08: The Sₙ1 Reaction
  93. 6.09: Characteristics of the Sₙ1 Reaction
  94. 6.10: Rearrangements of the Carbocation and Sₙ1 Reactions
  95. 6.11: The Hammond Postulate and Transition States
  96. 6.12: Comparison of SN1 and SN2 Reactions
  97. 6.13: Characteristics of the E2 Reaction
  98. 6.14: Zaitsev's Rule
  99. 6.15: Characteristics of the E1 Reaction
  100. 6.16: E2 Regiochemistry and Cyclohexane Conformations
  101. 6.17: The E2 Reaction and the Deuterium Isotope Effect
  102. 6.18: Comparison of E1 and E2 Reactions
  103. 6.19: Comparing Substitution and Elimination Reactions
  104. 6.20: Biological Substitution Reactions
  105. 6.21: Biological Elimination Reactions
  106. 6.22: Additional Exercises
  107. 6.23: Solutions to Additional Exercises
  108. 07: Structure and Synthesis of Alkenes
  109. 7.01: Alkene Structure
  110. 7.02: Physical Properties and Important Common Names
  111. 7.03: The Alkene Double Bond and Stereoisomerism
  112. 7.04: Degrees of Unsaturation
  113. 7.05: The E
  114. Z System (when cis
  115. trans does not work)
  116. 7.06: Stability of Alkenes
  117. 7.07: Alkene Synthesis by Elimination of Alkyl Halides
  118. 7.08: Alkene Synthesis by Dehydration of Alcohols
  119. 7.09: Uses
  120. 7.10: Additional Exercises
  121. 7.11: Solutions to Additional Exercises
  122. 08: Reactions of Alkenes
  123. 8.01: Electrophilic Addition Reactions (EARs)
  124. 8.02: Addition of Hydrogen Halides to Symmetrical Alkenes
  125. 8.03: Alkene Asymmetry and Markovnikov's Rule
  126. 8.04: Hydration: Acid Catalyzed Addition of Water
  127. 8.05: Hydration: Oxymercuration-Demercuration
  128. 8.06: Hydration: Hydroboration-Oxidation
  129. 8.07: Stereochemistry of Reactions - Hydration of Achiral Alkenes
  130. 8.08: Stereochemistry of Reactions - Hydration of Chiral Alkenes
  131. 8.09: Addition of Halogens
  132. 8.10: Formation of Halohydrins
  133. 8.11: Reduction of Alkenes - Catalytic Hydrogenation
  134. 8.12: Oxidation of Alkenes - Epoxidation
  135. 8.13: Dihydroxylation of Alkenes
  136. 8.14: Opening of Epoxides - Acidic versus Basic Conditions
  137. 8.15: Oxidative Cleavage of Alkenes
  138. 8.16: Addition of Carbenes to Alkenes - Cyclopropane Synthesis
  139. 8.17: Radical Chain-Growth Polymerization
  140. 8.18: 9.18 Biological Additions of Radicals to Alkenes
  141. 8.19: Additional Exercises
  142. 8.20: Solutions to Additional Exercises
  143. 09: Alkynes
  144. 9.01: Structure and Physical Properties
  145. 9.02: 10.2 Synthesis of Alkynes - Elimination Reactions of Dihalides
  146. 9.03: Reactions of Alkynes - Addition of HX and X₂
  147. 9.04: Hydration of Alkynes for Markovnikov Products
  148. 9.05: Hydration of Alkynes for Anti-Markovnikov Products
  149. 9.06: 10.6 Reduction of Alkynes
  150. 9.07: Oxidation of Alkynes
  151. 9.08: Acidity of Terminal Alkynes
  152. 9.09: Synthesis of Larger Alkynes from Acetylides
  153. 9.10: An Introduction to Multiple Step Synthesis
  154. 9.11: Additional Exercises
  155. 9.12: Solutions to Additional Exercises
  156. 10: Reactions of Alcohols
  157. 10.01: 14.1 Reactions of Alcohols with Hydrohalic Acids
  158. 10.02: Reactions with Phosphorus Halides
  159. 10.03: Alcohol conversion to Esters - Tosylate and Carboxylate
  160. 10.04: Dehydration Reactions of Alcohols
  161. 10.05: Oxidation States of Alcohols and Related Functional Groups
  162. 10.06: Oxidation Reactions of Alcohols
  163. 10.07: Determining Alcohol Classifications in the Lab - alternate reactions
  164. 10.08: Protection of Alcohols
  165. 10.09: Cleavage of Diols
  166. 10.10: Reactions of Alkoxides
  167. 10.11: Biological Oxidation - an introduction
  168. 10.12: Additional Exercises
  169. 10.13: Solutions to Additional Exercises
  170. 11: Structure and Synthesis of Alcohols
  171. 11.01: Introduction to Structure and Synthesis of Alcohols
  172. 11.02: Classification of Alcohols
  173. 11.03: Physical Properties of Alcohols
  174. 11.04: Spectroscopy of Alcohols
  175. 11.05: Acidity of Alcohols and Phenols
  176. 11.06: Synthesis of Alcohols - Review
  177. 11.07: Reduction of the Carbonyl Group - Synthesis of 1º and 2º Alcohols
  178. 11.08: Organometallic Reagents
  179. 11.09: Organometallic Reagents in Alcohol Synthesis
  180. 11.10: Thiols (Mercaptans)
  181. 11.11: Commercially Important Alcohols
  182. 11.12: 13.12 Additional Exercises
  183. 11.13: Solutions to Additional Exercises
  184. 12: Infrared Spectroscopy and Mass Spectrometry
  185. 12.01: The Electromagnetic Spectrum
  186. 12.02: Infrared (IR) Spectroscopy
  187. 12.03: IR-Active and IR-Inactive Vibrations
  188. 12.04: Interpretting IR Spectra
  189. 12.05: Infrared Spectra of Some Common Functional Groups
  190. 12.06: Summary and Tips to Distinguish between Carbonyl Functional Groups
  191. 12.07: Mass Spectrometry - an introduction
  192. 12.08: Fragmentation Patterns in Mass Spectrometry
  193. 12.09: Useful Patterns for Structure Elucidation
  194. 12.10: Determination of the Molecular Formula by High Resolution Mass Spectrometry
  195. 13: Nuclear Magnetic Resonance Spectroscopy
  196. 13.01: Theory of Nuclear Magnetic Resonance (NMR)
  197. 13.02: NMR Spectra - an introduction
  198. 13.03: Chemical Shifts and Shielding
  199. 13.04: ¹H NMR Spectroscopy and Proton Equivalence
  200. 13.05: Functional Groups and Chemical Shifts in ¹H NMR Spectroscopy
  201. 13.06: Integration of ¹H NMR Absorptions: Proton Counting
  202. 13.07: Spin-Spin Splitting in ¹H NMR Spectra
  203. 13.08: More Complex Spin-Spin Splitting Patterns
  204. 13.09: Uses of ¹H NMR Spectroscopy
  205. 13.10: ¹³C NMR Spectroscopy
  206. 13.11: Chemical Shifts and Interpreting ¹³C NMR Spectra
  207. 13.12: ¹³C NMR Spectroscopy
  208. 13.13: Uses of ¹³C NMR Spectroscopy
  209. 13.14: More NMR Examples
  210. 13.15: Sample NMR Spectra
  211. 14: Ethers Epoxides and Thioethers
  212. 14.01: Physical Properties of Ethers
  213. 14.02: Spectroscopy of Ethers
  214. 14.03: The Williamson Ether Synthesis
  215. 14.04: Alkoxymercuration-Demercuration Synthesis of Ethers
  216. 14.05: Acidic Cleavage of Ethers
  217. 14.06: Autoxidation of Ethers
  218. 14.07: Synthesis of Epoxides
  219. 14.08: Opening of Epoxides
  220. 14.09: Reactions of Epoxides with Grignard and Organolithium Reagents
  221. 14.10: Crown Ethers
  222. 14.11: Epoxy Resins: The Advent of Modern Glues
  223. 14.12: Thioethers (Sulfides) and Silyl Ethers
  224. 14.13: Additional Exercises
  225. 14.14: Solutions to Additional Exercises
  226. 15: Conjugated Systems Orbital Symmetry and Ultraviolet Spectroscopy
  227. 15.01: Stability of Conjugated Dienes - Molecular Orbital Theory
  228. 15.02: Allylic Cations
  229. 15.03: Electrophilic Additions to Conjugated Dienes
  230. 15.04: Kinetic versus Thermodynamic Control
  231. 15.05: SN2 Reactions of Allylic Halides and Tosylates
  232. 15.06: The Diels-Alder (4 2) Cycloaddition Reaction
  233. 15.07: Diels-Alder Stereochemistry
  234. 15.08: Diene Polymers - Natural and Synthetic Rubbers
  235. 15.09: Structure Determination in Conjugated Systems - Ultraviolet Spectroscopy
  236. 15.10: Interpreting Ultraviolet Spectra - The Effect of Conjugation
  237. 15.11: 16.11:Conjugation, Color, and the Chemistry of Vision
  238. 15.12: Additional Exercises
  239. 15.13: Solutions to Additional Exercises
  240. 16: Aromatic Compounds
  241. 16.01: Introduction: The Discovery of Benzene
  242. 16.02: The Structure and Properties of Benzene and its Derivatives
  243. 16.03: Resonance and the Molecular Orbitals of Benzene
  244. 16.04: The Molecular Orbital Picture of Cyclobutadiene
  245. 16.05: Aromaticity and Huckel's Rule
  246. 16.06: Aromatic Ions - a closer look
  247. 16.07: Heterocyclic Aromatic Compounds - a closer look
  248. 16.08: Polycyclic Aromatic Hydrocarbons
  249. 16.09: Spectroscopy of Aromatic Compounds
  250. 16.10: Additional Exercises
  251. 16.11: Solutions to Additional Exercises
  252. 17: Reactions of Aromatic Compounds
  253. 17.01: Electrophilic Aromatic Substitution (EAS)
  254. 17.02: Halogenation of Benzene (an EAS Reaction)
  255. 17.03: Nitration of Benzene (an EAS Reaction)
  256. 17.04: Sulfonation of Benzene (an EAS Reaction)
  257. 17.05: Alkylation and Acylation of Benzene - The Friedel-Crafts EAS Reactions
  258. 17.06: Substituent Effects on the EAS Reaction
  259. 17.07: Side-Chain Reactions of Benzene Derivatives
  260. 17.08: Synthetic Strategies for Di-substituted Benzenes
  261. 17.09: Trisubstituted Benzenes - Effects of Multiple Substituents
  262. 17.10: Nucleophilic Aromatic Substitution - The Addition-Elimantion Mechanism
  263. 17.11: NAS Reactions - the Elimination-Addition (Benzyne) Mechanism
  264. 17.12: Reduction of Aromatic Compounds
  265. 17.13: Additional Exercises
  266. 17.14: Solutions to Additional Exercises
  267. 18: Ketones and Aldehydes
  268. 18.01: Carbonyl Compound Structure and Properties
  269. 18.02: Spectroscopy of Ketones and Aldehydes
  270. 18.03: Review of Ketone and Aldehyde Synthesis
  271. 18.04: 19.4 New Synthesis of Aldehydes and Ketones
  272. 18.05: Nucleophilic Addition Reactions of Ketones and Aldehydes
  273. 18.06: Nucleophilic Addition of Water (Hydration)
  274. 18.07: Nucleophilic Addition of Cyanide and Acetylide
  275. 18.08: Nucleophilic Addition of Grignards
  276. 18.09: Nucelophilic Addition of Amines (Imine and Enamine Formation)
  277. 18.10: Nucleophilic Addition of Hydrazine (Wolff-Kishner Reaction)
  278. 18.11: Nucelophilic Addition of Alcohols (Acetal Formation)
  279. 18.12: Acetals as Protecting Groups
  280. 18.13: Nucelophilic Addition of Phosphorus Ylides (The Wittig Reaction)
  281. 18.14: Oxidation of Aldehydes
  282. 18.15: Reductions of Ketones and Aldehydes
  283. 18.16: Additional Exercises
  284. 18.17: Solutions to Additional Exercises
  285. 19: Carboxylic Acids
  286. 19.01: Structure and Properties of Carboxylic Acids and their Salts
  287. 19.02: Acidity of Carboxylic Acids
  288. 19.03: Spectroscopy of Carboxylic Acids
  289. 19.04: Synthesis of Carboxylic Acids
  290. 19.05: Reactions of Carboxylic Acids Overview
  291. 19.06: Condensation of Acids with Alcohols: The Fischer Esterification
  292. 19.07: Methyl Ester Synthesis Using Diazomethane
  293. 19.08: Condensation of Acids with Amines
  294. 19.09: Reduction of Carboxylic Acids
  295. 19.10: Biochemically Interesting Carboxylic Acids
  296. 19.11: Additional Exercises
  297. 19.12: Solutions to Additional Exercises
  298. 20: Carboxylic Acid Derivatives and Nitriles
  299. 20.01: Structure and Physical Properties of Acid Derivatives
  300. 20.02: Spectroscopy of Carboxylic Acid Derivatives
  301. 20.03: Interconversion of Acid Derivatives by Nucleophilic Acyl Substitution
  302. 20.04: Acid Halide Chemistry
  303. 20.05: Acid Anhydride Chemistry
  304. 20.06: Ester Chemistry
  305. 20.07: Amide Chemistry
  306. 20.08: Nitrile Chemistry
  307. 20.09: Thioesters: Biological Carboxylic Acid Derivatives
  308. 20.10: Polyamides and Polyesters: Step-Growth Polymers
  309. 20.11: Beta-Lactams: An Application
  310. 20.12: Biological Acylation Reactions
  311. 20.13: Additional Exercises
  312. 20.14: Solutions to Additional Exercises
  313. 21: Alpha Substitutions and Condensations of Carbonyl Compounds
  314. 21.01: Relative Acidity of alpha-Hydrogens
  315. 21.02: Enols, Enolate Ions and Tautomerization
  316. 21.03: Reaction Overview
  317. 21.04: Alpha Halogenation of Carbonyls
  318. 21.05: Bromination of Acids: The HVZ Reaction
  319. 21.06: Alkylation of the alpha-Carbon via the LDA pathway
  320. 21.07: Alkylation of the Alpha-Carbon via the Enamine Pathway
  321. 21.08: The Aldol Reaction and Condensation of Ketones and Aldehydes
  322. 21.09: The Claisen Condensation Reactions of Esters
  323. 21.10: Conjugate Additions: The Michael Reaction
  324. 21.11: Decarboxylation Reactions
  325. 21.12: Additional Exercises
  326. 21.13: Solutions to Additional Exercises
  327. 22: Amines
  328. 22.01: Structure and Physical Properties of Amines
  329. 22.02: Basicity of Amines and Ammonium Salt Formation
  330. 22.03: Spectroscopy of Amines
  331. 22.04: Synthesis of Amines
  332. 22.05: Synthesis of Primary Amines
  333. 22.06: Reactions of Amines
  334. 22.07: Reactions of Arylamines
  335. 22.08: The Hofmann Elimination: Amines as Leaving Groups
  336. 22.09: Oxidation of Amines - The Cope Elimination
  337. 22.10: Sulfa Drugs - a closer look
  338. 22.11: Additional Exercises
  339. 22.12: Solutions to Additional Exercises
  340. 23: Carbohydrates
  341. 23.01: Introduction
  342. 23.02: Classification of Carbohydrates
  343. 23.03: Fischer Projections
  344. 23.04: D and L Sugars
  345. 23.05: Configuration of Aldoses
  346. 23.06: Cyclic Structures of Monosaccharides
  347. 23.07: Reactions of Monosaccharides
  348. 23.08: Disaccharides and Glycosidic Bonds
  349. 23.09: Polysaccharides
  350. 23.10: Other Important Carbohydrates
  351. 23.11: Cell Surface Carbohydrates and Influenza Viruses
  352. 24: Amino Acids Peptides and Proteins
  353. 24.01: Introduction
  354. 24.02: Structure and Stereochemistry of the Amino Acids
  355. 24.03: Isoelectric Points and Electrophoresis
  356. 24.04: Synthesis of Amino Acids
  357. 24.05: Peptides and Proteins
  358. 24.06: Amino Acid Analysis of Peptides
  359. 24.07: Peptide Sequencing: The Edman Degradation
  360. 24.08: Peptide Synthesis
  361. 24.09: Automated Peptide Synthesis: The Merrifield Solid-Phase Technique
  362. 24.10: Levels of Protein Structure
  363. 24.11: Enzymes and Coenzymes
  364. 24.12: How do enzymes work?
  365. 25: Lipids
  366. 25.1: Introduction
  367. 25.2: Waxes, Fats, and Oils
  368. 25.3: Saponification of Fats and Oils; Soaps and Detergents
  369. 25.4: Phospholipids
  370. 25.5: Prostaglandins and other Eicosanoids
  371. 25.6: Terpenes and Terpenoids
  372. 25.7: Steroids
  373. 25.8: Biosynthesis of Steroids
  374. 26: Nucleic Acids
  375. 26.1: Nucleotides and Nucleic Acids
  376. 26.2: DNA Base Pairs
  377. 26.3: DNA Replication
  378. 26.4: Transcription of DNA
  379. 26.5: Translation of RNA: Protein Biosynthesis
  380. 26.6: DNA Sequencing
  381. 26.7: Polymerase Chain Reactions
  382. 27: Front Matter
  383. 27.1: Table of Contents
  384. 28: Back Matter