Domanda del libro di testo
Draw 1,2,3,4,5,6-hexachlorocyclohexane with
a. all the chloro groups in axial positions.
b. all the chloro groups in equatorial positions.
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Ch. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- 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
Tutti i libri di testo
Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and StructureProblema 47
Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and StructureProblema 47Capitolo 3, Problema 47
The chair conformer of fluorocyclohexane is 0.25 kcal/mol more stable when the fluoro substituent is in an equatorial position than when it is in an axial position. How much more stable is the anti conformer than a gauche conformer of 1-fluoropropane, considering rotation about the C1−C2 bond?
Guida verificata passo dopo passo1
Understand the problem: The question involves comparing the stability of conformers in two different molecules. First, we are given the stability difference for fluorocyclohexane when the fluoro group is in the equatorial vs. axial position. Then, we are asked to determine the stability difference between the anti and gauche conformers of 1-fluoropropane, considering the steric and electronic interactions during rotation about the C1−C2 bond.
Recall the key concepts: In fluorocyclohexane, the equatorial position is more stable than the axial position due to reduced 1,3-diaxial interactions. For 1-fluoropropane, the anti conformer is more stable than the gauche conformer because the anti conformer minimizes steric hindrance and dipole-dipole repulsion between the fluorine atom and the other substituents.
Relate the stability difference: The stability difference between the anti and gauche conformers of 1-fluoropropane can be estimated using the given stability difference for fluorocyclohexane (0.25 kcal/mol). This is because the gauche interaction in 1-fluoropropane is analogous to the axial interaction in fluorocyclohexane, where steric and electronic effects are similar.
Set up the calculation: The anti conformer of 1-fluoropropane is more stable than the gauche conformer by approximately the same energy difference as the equatorial conformer of fluorocyclohexane is more stable than the axial conformer. Therefore, the stability difference between the anti and gauche conformers is approximately 0.25 kcal/mol.
Conclude: The anti conformer of 1-fluoropropane is approximately 0.25 kcal/mol more stable than the gauche conformer, based on the analogy to the stability difference in fluorocyclohexane.
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Chair Conformation
The chair conformation is a three-dimensional arrangement of cyclohexane that minimizes steric strain and torsional strain. In this conformation, substituents can occupy either equatorial or axial positions, with equatorial positions generally being more stable due to reduced steric hindrance. Understanding this concept is crucial for analyzing the stability of substituted cyclohexanes, such as fluorocyclohexane.
Video consigliato:
03:29
Understanding what a conformer is.
Gauche and Anti Conformers
In alkanes, conformers refer to different spatial arrangements of atoms that result from rotation around single bonds. The gauche conformer has substituents positioned 60 degrees apart, while the anti conformer has them 180 degrees apart. The anti conformer is typically more stable due to minimized steric interactions, making it essential to compare the stability of these conformers in molecules like 1-fluoropropane.
Video consigliato:
03:19The Anti-Coplanar Requirement
Stability and Energy Differences
The stability of molecular conformers is often quantified in terms of energy differences, typically measured in kcal/mol. A lower energy state indicates greater stability, while a higher energy state suggests increased strain or steric hindrance. In the context of the question, understanding how to compare the energy differences between the anti and gauche conformers of 1-fluoropropane is key to determining their relative stability.
Video consigliato:
03:43The radical stability trend.
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