Domanda del libro di testo
Name the following compounds:
c.
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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
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Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and StructureProblema 85
Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and StructureProblema 85Capitolo 3, Problema 85
One of the chair conformers of cis-1,3-dimethylcyclohexane is 5.4 kcal/mol less stable than the other. How much steric strain does a 1,3-diaxial interaction between two methyl groups introduce into the conformer?
Guida verificata passo dopo passo1
Step 1: Understand the problem. The question asks us to determine the steric strain introduced by a 1,3-diaxial interaction between two methyl groups in one of the chair conformers of cis-1,3-dimethylcyclohexane. The given information states that one conformer is 5.4 kcal/mol less stable than the other.
Step 2: Recall the concept of 1,3-diaxial interactions. In cyclohexane chair conformations, substituents in axial positions experience steric strain due to interactions with axial hydrogens on the same side of the ring. For cis-1,3-dimethylcyclohexane, the methyl groups in axial positions will interact with each other, introducing steric strain.
Step 3: Analyze the stability difference. The stability difference of 5.4 kcal/mol between the two conformers is due to the steric strain caused by the 1,3-diaxial interaction of the methyl groups in the less stable conformer. This strain is the value we are trying to determine.
Step 4: Relate the steric strain to the stability difference. Since the stability difference is entirely attributed to the steric strain from the 1,3-diaxial interaction, the steric strain introduced by the interaction is equal to the given stability difference of 5.4 kcal/mol.
Step 5: Conclude the reasoning. The steric strain introduced by the 1,3-diaxial interaction between the two methyl groups in the less stable conformer is 5.4 kcal/mol, as this accounts for the entire stability difference between the two conformers.
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Chair Conformation
Chair conformation is the most stable arrangement of cyclohexane rings, minimizing steric strain and torsional strain. In this conformation, carbon atoms adopt a staggered arrangement, allowing substituents to occupy equatorial or axial positions. The stability of different chair conformers can vary significantly based on the positioning of substituents, such as methyl groups, which can lead to steric interactions.
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03:29
Understanding what a conformer is.
Steric Strain
Steric strain arises when atoms are forced closer together than their atomic radii allow, leading to increased energy in a molecule. In cyclohexane derivatives, substituents in axial positions can experience steric strain due to 1,3-diaxial interactions, where axial substituents interact unfavorably with hydrogen atoms on the same side of the ring. This strain contributes to the overall stability of the conformer.
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02:00What is torsional strain?
1,3-Diaxial Interactions
1,3-diaxial interactions occur in cyclohexane when axial substituents interact with hydrogen atoms located two carbons away on the same side of the ring. These interactions create steric hindrance, which destabilizes the conformer. In the case of cis-1,3-dimethylcyclohexane, the presence of two axial methyl groups leads to significant steric strain, affecting the energy difference between the chair conformers.
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Percorso guidato
2:41Interactions within the Tertiary Structure Concept 2
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The most stable form of glucose (blood sugar) is a six-membered ring in a chair conformation with its five substituents all in equatorial positions. Draw the most stable conformer of glucose by putting the OH groups and hydrogens on the appropriate bonds in the structure on the right.
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Name the following compounds:
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What is each compound’s systematic name?
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