Textbook Question
What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?
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Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 9 - Substitution and Elimination Reactions of Alkyl HalidesProblem 23b
Bruice 8th EditionCh. 9 - Substitution and Elimination Reactions of Alkyl HalidesProblem 23bChapter 10, Problem 23b
What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?
b. 
Verified step by step guidance1
Step 1: Understand the E2 elimination mechanism. E2 is a bimolecular elimination reaction where a base removes a proton from a β-carbon (adjacent to the carbon bonded to the leaving group), and the leaving group departs simultaneously, forming a double bond.
Step 2: Identify the alkyl halide structure. Analyze the given alkyl halide to determine the position of the leaving group (halide) and the β-hydrogens available for elimination.
Step 3: Determine the most substituted alkene product. According to Zaitsev's rule, the major product of an E2 reaction is typically the more substituted alkene, as it is more stable due to hyperconjugation and inductive effects.
Step 4: Consider stereochemistry. For an E2 reaction, the β-hydrogen and the leaving group must be anti-periplanar (in opposite planes). Ensure that the geometry of the molecule allows for this arrangement.
Step 5: Write the structure of the major elimination product. Based on the β-hydrogen abstraction and the departure of the leaving group, draw the most substituted alkene that satisfies the anti-periplanar requirement and Zaitsev's rule.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
E2 Reaction Mechanism
The E2 (bimolecular elimination) reaction is a concerted process where a base abstracts a proton from a β-carbon while a leaving group departs from the α-carbon, resulting in the formation of a double bond. This mechanism requires strong bases and typically occurs in a single step, leading to the formation of alkenes. The stereochemistry of the substrate can influence the product distribution.
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Drawing the E2 Mechanism.
Alkyl Halides
Alkyl halides are organic compounds containing a carbon atom bonded to a halogen atom (F, Cl, Br, I). The reactivity of alkyl halides in elimination reactions is influenced by the structure of the carbon chain (primary, secondary, or tertiary) and the nature of the leaving group. Understanding the type of alkyl halide is crucial for predicting the major product of an E2 reaction.
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Regioselectivity and Zaitsev's Rule
Regioselectivity in elimination reactions refers to the preference for forming one alkene over another when multiple products are possible. Zaitsev's Rule states that the more substituted alkene (the one with more alkyl groups attached to the double bond) is generally the major product in E2 reactions. This principle helps predict the outcome of reactions involving different alkyl halides.
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Related Practice
Textbook Question
What is the major elimination product obtained from the reaction of each of the following alkyl halides with hydroxide ion?
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Textbook Question
What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?
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Textbook Question
What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?
c.
d.
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Textbook Question
What is the major elimination product obtained from the reaction of each of the following alkyl halides with hydroxide ion?
a.
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Textbook Question
What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?
a.
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