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Name reactions

Organic Chemistry Lecture 19b

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Chemistry
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Chemistry
Organic chemistry
Functional groups
Name reactions
Substitution reactions
Amine
Amide
Amination
Imine
Nitrile
Sulfonamide
Aniline

Chapter 19 * Alkylation of Amines by Alkyl Halides Even if just one equivalent of the halide is added, some amine molecules will react once, some will react twice, and some will react three times (to give the tetraalkylammonium salt). Chapter 19 * Examples of Useful Alkylations Exhaustive alkylation to form the tetraalkylammonium salt. Reaction with large excess of NH3 to form the primary amine. C H 3 C H 2 C H C H 2 C H 2 C H 3 N ( C H 3 ) 3 C H 3 C H 2 C H C H 2 C H 2 C H 3 N H 2 3 C H 3 I N a H C O 3 + _ I C H 3 C H 2 C H 2 B r N H 3 ( x s ) C H 3 C H 2 C H 2 N H 2 + N H 4 B r Chapter 19 Chapter 19 * Acylation of Amines Primary and secondary amines react with acid halides to form amides. This reaction is a nucleophilic acyl substitution. Chapter 19 *

Organic Chemistry Lecture 15

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Chemistry
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Chemistry
Chemical bonding
Functional groups
Name reactions
Diels–Alder reaction
Diene
Physical organic chemistry
Quantum chemistry
Antibonding molecular orbital
Allyl group
Conjugated system
Alkene

Chapter 15 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy Chaper 15 * Conjugated Systems Conjugated double bonds are separated by one single bond. Isolated double bonds are separated by two or more single bonds. Conjugated double bonds are more stable than isolated ones. Chaper 15 Chaper 15 * Heat of Hydrogenation of Conjugated Bonds For conjugated double bonds, the heat of hydrogenation is less than the sum for the individual double bonds. The more stable the compound, the less heat released during hydrogenation, Conjugated double bonds have extra stability. Chaper 15 Chaper 15 * Relative Stabilities twice 1-pentene more substituted Chaper 15 Chaper 15 * Structure of 1,3-Butadiene

Organic Chemistry Lecture 17

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Chemistry
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Chemistry
Organic chemistry
Functional groups
Substitution reactions
Physical organic chemistry
Organic reactions
Name reactions
Markovnikov's rule
Alkene
Electrophile
Electrophilic aromatic substitution
Electrophilic addition
Chapter 8 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Reactions of Alkenes Chapter 8 * Bonding in Alkenes Electrons in pi bond are loosely held. The double bond acts as a nucleophile attacking electrophilic species. Carbocations are intermediates in the reactions. These reactions are called electrophilic additions. Chapter 8 Chapter 8 * Electrophilic Addition Step 1: Pi electrons attack the electrophile. Step 2: Nucleophile attacks the carbocation. Chapter 8 Chapter 8 * Types of Additions Chapter 8 Chapter 8 * Addition of HX to Alkenes Step 1 is the protonation of the double bond. The protonation step forms the most stable carbocation possible. In step 2, the nucleophile attacks the carbocation, forming an alkyl halide.

Organic Chemistry Lecture 15

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Chemistry
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Chemistry
Chemical bonding
Functional groups
Name reactions
Diels–Alder reaction
Diene
Physical organic chemistry
Quantum chemistry
Antibonding molecular orbital
Allyl group
Conjugated system
Alkene

Chapter 15 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy Chaper 15 * Conjugated Systems Conjugated double bonds are separated by one single bond. Isolated double bonds are separated by two or more single bonds. Conjugated double bonds are more stable than isolated ones. Chaper 15 Chaper 15 * Heat of Hydrogenation of Conjugated Bonds For conjugated double bonds, the heat of hydrogenation is less than the sum for the individual double bonds. The more stable the compound, the less heat released during hydrogenation, Conjugated double bonds have extra stability. Chaper 15 Chaper 15 * Relative Stabilities twice 1-pentene more substituted Chaper 15 Chaper 15 * Structure of 1,3-Butadiene

Organic Chemistry Lecture 11b

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Chemistry
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Functional groups
Substitution reactions
Name reactions
Chlorides
Rearrangement reactions
Alcohol
SN1 reaction
Ester
Lucas' reagent
Pinacol rearrangement

Chapter 11 * Reaction with HBr ?OH of alcohol is protonated. ?OH2+ is good leaving group. 3? and 2? alcohols react with Br- via SN1. 1? alcohols react via SN2. H 3 O + B r - R O H R O H H R B r Chapter 11 Chapter 11 * Reaction with HCl Chloride is a weaker nucleophile than bromide. Add ZnCl2, which bonds strongly with ?OH, to promote the reaction. The chloride product is insoluble. Lucas test: ZnCl2 in concentrated HCl: 1? alcohols react slowly or not at all. 2? alcohols react in 1-5 minutes. 3? alcohols react in less than 1 minute. Chapter 11 Chapter 11 * SN2 Reaction with the Lucas Reagent Primary alcohols react with the Lucas reagent (HCl and ZnCl2) by the SN2 mechanism. Reaction is very slow. The reaction can take from several minutes to several days. Chapter 11 *

Organic Chemistry Lecture 11a

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Chemistry
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Functional groups
Oxidizing agents
Name reactions
Chromates
Pyridinium chlorochromate
Jones oxidation
Collins reagent
Alcohol
Chromic acid
Alkene

Chapter 11 Reactions of Alcohols ?2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Chapter 11 * Types of Alcohol Reactions Dehydration to alkene Oxidation to aldehyde, ketone Substitution to form alkyl halide Reduction to alkane Esterification Tosylation Williamson synthesis of ether Chapter 11 Chapter 11 * Summary Table Chapter 11 Chapter 11 * Oxidation States Easy for inorganic salts: CrO42- reduced to Cr2O3. KMnO4 reduced to MnO2. Oxidation: Gain of O, O2, or X2; loss of H2. Reduction: Gain of H2 (or H-); loss of O or O2; and loss of X2. The gain or loss of H+, H2O, HX, etc. is neither an oxidation nor a reduction. Chapter 11 Chapter 11 * Oxidation States of Carbons Chapter 11 Chapter 11 *
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