Textbook Question
Identify the following compounds as primary, secondary, or tertiary amines.
b. CH3CH2CH2NHCH(CH3)2
Ch.16 Amines
McMurry8th EditionFundamentals of GOBISBN: 9780134015187
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Table of contents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
Chapter 16, Problem 1a
Identify the following compounds as primary, secondary, or tertiary amines.
a. CH3(CH2)4CH2NH2
Verified step by step guidance1
Step 1: Understand the structure of an amine. Amines are organic compounds derived from ammonia (NH₃) by replacing one or more hydrogen atoms with alkyl or aryl groups. They are classified as primary, secondary, or tertiary based on the number of alkyl or aryl groups attached to the nitrogen atom.
Step 2: Analyze the given compound, CH₃(CH₂)₄CH₂NH₂. This can be rewritten as CH₃-(CH₂)₅-NH₂, where the NH₂ group is attached to the end of a six-carbon chain.
Step 3: Determine the number of alkyl groups attached to the nitrogen atom. In this case, the nitrogen atom is bonded to one alkyl group (a six-carbon chain) and two hydrogen atoms.
Step 4: Recall the classification criteria: A primary amine has one alkyl or aryl group attached to the nitrogen atom, a secondary amine has two, and a tertiary amine has three. Since this nitrogen atom is bonded to one alkyl group and two hydrogens, it is classified as a primary amine.
Step 5: Conclude that the compound CH₃(CH₂)₄CH₂NH₂ is a primary amine based on the analysis of its structure and bonding.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Amines
Amines are organic compounds derived from ammonia (NH₃) by replacing one or more hydrogen atoms with alkyl or aryl groups. They are classified based on the number of carbon-containing groups attached to the nitrogen atom: primary amines have one carbon group, secondary amines have two, and tertiary amines have three. Understanding this classification is essential for identifying the type of amine in a given compound.
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Amine Classification Example 1
Primary, Secondary, and Tertiary Amines
The classification of amines into primary, secondary, and tertiary is based on the number of carbon atoms bonded to the nitrogen atom. A primary amine has one carbon group (R-NH₂), a secondary amine has two (R₂NH), and a tertiary amine has three (R₃N). This distinction is crucial for predicting the chemical behavior and reactivity of the amines in various reactions.
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Structural Representation
Understanding the structural representation of organic compounds is vital for identifying functional groups and classifying compounds. In the case of CH₃(CH₂)₄ CH₂NH₂, the structure indicates that the nitrogen atom is bonded to one carbon chain (the alkyl group) and two hydrogen atoms, which confirms it as a primary amine. Recognizing these structural features allows for accurate classification and analysis of amines.
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