Textbook Question
Predict the products of the following reactions:
(a) excess NH3 + Ph–CH2CH2CH2Br →
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Ch. 19 - Amines
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 19, Problem 36d,e,f
Which of the following compounds are capable of being resolved into enantiomers?
(d) 1,2,2-trimethylaziridine
(e) 
(f) 
Verified step by step guidance1
Step 1: To determine whether a compound can be resolved into enantiomers, check if the compound is chiral. Chirality arises when a molecule has a non-superimposable mirror image, typically due to the presence of an asymmetric carbon or a stereogenic center.
Step 2: Analyze the structure of 1,2,2-trimethylaziridine. Aziridine is a three-membered ring containing a nitrogen atom. In this case, the nitrogen is bonded to three different groups: a methyl group, another methyl group, and a hydrogen atom. The nitrogen atom can act as a stereogenic center if it is part of a chiral environment.
Step 3: Consider the nitrogen atom in the first image (quaternary ammonium salt). The nitrogen is bonded to four different groups: a methyl group, an ethyl group, a cyclopentyl group, and a chloride ion. This creates a chiral center, making the compound capable of being resolved into enantiomers.
Step 4: Examine the second image (quaternary ammonium salt with a double bond in the cyclopentyl ring). The nitrogen is still bonded to four different groups, and the double bond does not affect the chirality of the nitrogen. Therefore, this compound is also capable of being resolved into enantiomers.
Step 5: Summarize the findings: Both compounds in the images are quaternary ammonium salts with a chiral nitrogen center. Since the nitrogen is bonded to four different groups in both cases, these compounds are capable of being resolved into enantiomers.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chirality
Chirality is a property of a molecule that makes it non-superimposable on its mirror image, much like left and right hands. A chiral molecule typically has at least one carbon atom bonded to four different substituents, creating two distinct forms known as enantiomers. Understanding chirality is essential for determining whether a compound can be resolved into enantiomers.
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What is chirality?
Enantiomers
Enantiomers are a pair of chiral molecules that are mirror images of each other. They have identical physical properties in an achiral environment but can exhibit different behaviors in chiral environments, such as biological systems. Identifying whether a compound can form enantiomers is crucial for understanding its chemical behavior and potential applications.
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Stereocenters
A stereocenter, often a chiral center, is a specific atom in a molecule, usually carbon, that has four different substituents attached to it. The presence of one or more stereocenters in a compound is a key indicator of its potential to exist as enantiomers. Analyzing the stereocenters in a compound helps in determining its chirality and whether it can be resolved into enantiomers.
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Related Practice
Textbook Question
Which of the following compounds are capable of being resolved into enantiomers?
(a) N-ethyl-N-methylaniline
(b) 2-methylpiperidine
(c) 1-methylpiperidine
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Textbook Question
Complete the following proposed acid–base reactions, and predict whether the reactants or products are favored.
(a)
(b)
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Textbook Question
In each pair of compounds, select the stronger base, and explain your choice.
(a) HOCH2CH2NH2 or CH3CH2NH2
(b) PhNH2 or PhCH2NH2
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Textbook Question
Which of the following compounds are capable of being resolved into enantiomers?
(g)
(h)
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Textbook Question
In each pair of compounds, select the stronger base, and explain your choice.
(c)
(d)
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