Textbook Question
Draw the product of each of the following reactions:
e.
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Ch. 28 - Pericyclic Reactions
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
Chapter 25, Problem 23d
Draw the product of each of the following reactions:
d. 
Verified step by step guidance1
Step 1: Analyze the given structure. The molecule is a cyclohexadiene with two deuterium (D) atoms and two hydrogen (H) atoms attached to the cyclohexane ring. The reaction involves exposure to light (hv), indicating a photochemical reaction.
Step 2: Recognize the type of reaction. Photochemical reactions often involve excitation of electrons, leading to rearrangements or bond cleavage. In this case, the reaction likely involves a [1,3]-sigmatropic hydrogen shift or a similar rearrangement.
Step 3: Predict the movement of atoms. Under photochemical conditions, one of the hydrogens or deuteriums may shift positions within the molecule, leading to a new arrangement of substituents on the ring.
Step 4: Consider the stereochemistry. The stereochemistry of the molecule must be preserved or altered based on the mechanism of the reaction. The relative positions of D and H atoms will change depending on the shift.
Step 5: Draw the product structure. The final product will be a rearranged cyclohexadiene with the new positions of D and H atoms. Ensure that the double bonds remain intact and the stereochemistry is accurately represented.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Reaction Mechanisms
Understanding reaction mechanisms is crucial in organic chemistry as they describe the step-by-step process by which reactants transform into products. This includes identifying intermediates, transition states, and the movement of electrons. Familiarity with mechanisms helps predict the outcome of reactions and the stability of products formed.
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Functional Groups
Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups is essential for predicting reactivity and understanding how different compounds will interact in a reaction. Common functional groups include alcohols, carboxylic acids, and amines.
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Stereochemistry
Stereochemistry involves the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. It is important for understanding isomerism, where compounds with the same molecular formula can have different structures and properties. Stereochemical considerations are vital when drawing reaction products, especially in reactions involving chiral centers.
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Related Practice
Textbook Question
Draw the product of each of the following reactions:
g.
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Textbook Question
Chorismate mutase is an enzyme that promotes a pericyclic reaction by forcing the substrate to assume the conformation needed for the reaction. The product of the pericyclic reaction is prephenate that is subsequently converted into the amino acids phenylalanine and tyrosine. What kind of a pericyclic reaction does chorismate mutase catalyze?
1
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Textbook Question
Explain why the hydrogen and the methyl substituent are trans to one another after photochemical ring closure of provitamin D3 to form 7-dehydrocholesterol.
1
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Textbook Question
Draw the product of each of the following reactions:
f.
2
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Textbook Question
Does the [1,7] sigmatropic rearrangement that converts provitamin D3 to vitamin D3 involve suprafacial or antarafacial rearrangement?
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