Textbook Question
Name the following:
b.
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Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics
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. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and KineticsProblem 44
Bruice 8th EditionCh. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and KineticsProblem 44Chapter 6, Problem 44
a. Draw the condensed structures and give the systematic names for all the alkenes with molecular formula C6H12, ignoring stereoisomers. (Hint: There are 13.)
b. Which of the alkenes have E and Z isomers?
c. Which of the alkenes is the most stable?
d. Which of the alkenes is the least stable?
Verified step by step guidance1
Step 1: Begin by understanding the molecular formula C6H12. This formula corresponds to alkenes, which are hydrocarbons containing at least one double bond. The general formula for alkenes is CnH2n, indicating one degree of unsaturation (a double bond).
Step 2: To draw the condensed structures, systematically consider all possible carbon chain arrangements (straight chains and branched chains) with six carbons. Place the double bond in different positions along the chain to generate unique structures. Ensure you account for all possible structural isomers, ignoring stereoisomers for now.
Step 3: Assign systematic names to each structure using IUPAC nomenclature rules. Identify the longest carbon chain containing the double bond, number the chain to give the double bond the lowest possible number, and name substituents accordingly. Verify that you have 13 unique structures.
Step 4: To determine which alkenes have E/Z isomers, identify structures with a double bond where two different groups are attached to each carbon of the double bond. Use the Cahn-Ingold-Prelog priority rules to distinguish E (opposite sides) and Z (same side) configurations.
Step 5: Evaluate the stability of the alkenes. Stability is influenced by factors such as the degree of substitution of the double bond (more substituted alkenes are more stable) and steric hindrance. The least stable alkene will likely be the one with the least substitution and/or the most steric strain.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Alkene Structure and Nomenclature
Alkenes are hydrocarbons that contain at least one carbon-carbon double bond (C=C). The molecular formula C6H12 indicates that the compound is an alkene, as it follows the general formula CnH2n for alkenes. Systematic naming involves identifying the longest carbon chain containing the double bond and using the appropriate suffix, typically '-ene', along with locants to indicate the position of the double bond.
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E/Z Isomerism
E/Z isomerism is a type of stereoisomerism that occurs in alkenes due to the restricted rotation around the double bond. The 'E' (entgegen) configuration indicates that the highest priority substituents on each carbon of the double bond are on opposite sides, while 'Z' (zusammen) indicates they are on the same side. To determine E/Z configurations, the Cahn-Ingold-Prelog priority rules are applied to the substituents attached to the double-bonded carbons.
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Stability of Alkenes
The stability of alkenes is influenced by factors such as substitution and steric strain. Generally, more substituted alkenes (those with more alkyl groups attached to the double bond) are more stable due to hyperconjugation and the inductive effect. Conversely, less substituted alkenes are less stable. The stability can also be affected by steric hindrance and the presence of strain in cyclic alkenes.
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Related Practice
Textbook Question
Draw the condensed structure for each of the following:
a. (Z)-1,3,5-tribromo-2-pentene
b. (Z)-3-methyl-2-heptene
c. (E)-1,2-dibromo-3-isopropyl-2-hexene
1530
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Textbook Question
Draw the skeletal structures for the compounds in Problem 42.
d. vinyl bromide
e. 1,2-dimethylcyclopentene
f. diallylamine
1225
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Textbook Question
Name the following:
a.
996
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Textbook Question
Name the following:
c.
985
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Textbook Question
Draw the condensed structure for each of the following:
d. vinyl bromide
e. 1,2-dimethylcyclopentene
f. diallylamine
1485
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