Textbook Question
What is wrong with the following structures?
a. CH3=CHCH2CH2OH
Ch.12 Introduction to Organic Chemistry: Alkanes
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 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
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Not the one you use?Change textbook
Chapter 12, Problem 46a
Which of the following pairs of structures are identical, which are isomers, and which are unrelated?
a. 
Verified step by step guidance1
Examine the structures in the image carefully. Look for similarities and differences in the arrangement of atoms, functional groups, and connectivity between the atoms.
Determine if the two structures have the same molecular formula. If they do not, they are unrelated. If they do, proceed to the next step.
Check the connectivity of the atoms in each structure. If the atoms are connected in the same way, the structures are identical. If the connectivity differs, proceed to the next step.
Analyze the spatial arrangement of the atoms (if stereochemistry is shown). If the connectivity is the same but the spatial arrangement differs (e.g., cis/trans isomers or enantiomers), the structures are isomers.
Conclude whether the structures are identical, isomers, or unrelated based on the analysis of molecular formula, connectivity, and spatial arrangement.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Identical Structures
Identical structures refer to molecules that have the same molecular formula and the same arrangement of atoms. These structures are essentially the same in every aspect, including their physical and chemical properties. For example, two molecules of water (H2O) are identical as they have the same composition and structure.
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Structural Formula Concept 2
Isomers
Isomers are compounds that share the same molecular formula but differ in the arrangement of atoms, leading to different structural or spatial configurations. This can result in variations in physical and chemical properties. For instance, glucose and fructose are isomers, both having the formula C6H12O6 but differing in structure and properties.
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Unrelated Structures
Unrelated structures are compounds that do not share the same molecular formula or structural characteristics. These molecules are distinct in their composition and properties, making them fundamentally different. An example would be comparing water (H2O) and carbon dioxide (CO2), which have entirely different formulas and functions.
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Related Practice
Textbook Question
How many isomers can you write that fit the following descriptions? See Worked Example 12.12 for guidance.
c. Alcohols (―OH) formed from 2-methylhexane
Textbook Question
What are the IUPAC names of the following alkanes?
f.
Textbook Question
There are two things wrong with the following structure. What are they?
Textbook Question
How many straight-chain isomers can you write that fit the following descriptions? See Worked Example 12.12 for guidance.
b. Amines (―NH2) with a longest chain of 7 carbons
Textbook Question
Write condensed structures for the following molecular formulas. More than one isomer will be required for each.
a. Isomers of C8H18 that contain two methyl groups and a longest chain of 4 carbons