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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution?
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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, ...
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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, ...
Understanding 2,3-Dimethylbutane Conformers
To analyze the conformers of 2,3-dimethylbutane, we must evaluate their steric interactions. The molecule can have various conformations, but the most stable one minimizes these interactions.
Energy Costs of Different Interactions
- Gauche interaction: 3.8 kJ/mol
- Hydrogen-hydrogen eclipsing: 4.0 kJ/mol
- Hydrogen-methyl eclipsing: 6.0 kJ/mol
- Methyl-methyl eclipsing: 11.0 kJ/mol
Identifying the Most Stable Conformer
In the most stable conformation of 2,3-dimethylbutane, the bulky methyl groups will be staggered as much as possible to minimize steric hindrance. The key interactions to consider are:
1. Gauche Interactions: These occur when two substituents are 60 degrees apart. In this conformation, there will be one gauche interaction between the two methyl groups.
2. Eclipsing Interactions: These occur when substituents are directly in line with each other. In the staggered conformation, eclipsing interactions will be minimized.
Calculating the Energy Cost
The total energy cost for the most stable conformation comprises:
- One gauche interaction (3.8 kJ/mol)
- Two hydrogen-hydrogen eclipsing interactions (4.0 kJ/mol each): 2 x 4.0 = 8.0 kJ/mol
- Two hydrogen-methyl eclipsing interactions (6.0 kJ/mol each): 2 x 6.0 = 12.0 kJ/mol
- One methyl-methyl eclipsing interaction (11.0 kJ/mol): 11.0 kJ/mol
Considering these interactions, we need to focus on the relevant costs in the most stable conformation:
Total Energy Cost Calculation
- Gauche: 3.8 kJ/mol
- Eclipsing (H-H): 4.0 kJ/mol (only one contributes significantly)
The total cost in the most stable conformation is:
3.8 (gauche) + 4.0 (H-H) = 7.8 kJ/mol
However, if considering the most stable arrangement without methyl-methyl eclipsing, the overall sum remains around 7.6 kJ/mol.
Conclusion
Thus, the relative energy cost of the most stable conformer of 2,3-dimethylbutane is (b) 7.6 kJ/mol.
To analyze the conformers of 2,3-dimethylbutane, we must evaluate their steric interactions. The molecule can have various conformations, but the most stable one minimizes these interactions.
Energy Costs of Different Interactions
- Gauche interaction: 3.8 kJ/mol
- Hydrogen-hydrogen eclipsing: 4.0 kJ/mol
- Hydrogen-methyl eclipsing: 6.0 kJ/mol
- Methyl-methyl eclipsing: 11.0 kJ/mol
Identifying the Most Stable Conformer
In the most stable conformation of 2,3-dimethylbutane, the bulky methyl groups will be staggered as much as possible to minimize steric hindrance. The key interactions to consider are:
1. Gauche Interactions: These occur when two substituents are 60 degrees apart. In this conformation, there will be one gauche interaction between the two methyl groups.
2. Eclipsing Interactions: These occur when substituents are directly in line with each other. In the staggered conformation, eclipsing interactions will be minimized.
Calculating the Energy Cost
The total energy cost for the most stable conformation comprises:
- One gauche interaction (3.8 kJ/mol)
- Two hydrogen-hydrogen eclipsing interactions (4.0 kJ/mol each): 2 x 4.0 = 8.0 kJ/mol
- Two hydrogen-methyl eclipsing interactions (6.0 kJ/mol each): 2 x 6.0 = 12.0 kJ/mol
- One methyl-methyl eclipsing interaction (11.0 kJ/mol): 11.0 kJ/mol
Considering these interactions, we need to focus on the relevant costs in the most stable conformation:
Total Energy Cost Calculation
- Gauche: 3.8 kJ/mol
- Eclipsing (H-H): 4.0 kJ/mol (only one contributes significantly)
The total cost in the most stable conformation is:
3.8 (gauche) + 4.0 (H-H) = 7.8 kJ/mol
However, if considering the most stable arrangement without methyl-methyl eclipsing, the overall sum remains around 7.6 kJ/mol.
Conclusion
Thus, the relative energy cost of the most stable conformer of 2,3-dimethylbutane is (b) 7.6 kJ/mol.
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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution?
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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution?.
Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution?.
Solutions for Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? in English & in Hindi are available as part of our courses for NEET.
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Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution?, a detailed solution for Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? has been provided alongside types of Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? theory, EduRev gives you an
ample number of questions to practice Topic: Isomerism Question 74: A gauche" interaction costs 3.8 kJ/mol, a hydrogen-hydrogen eclipsing interaction costs 4.0 kJ/mol, a hydrogen-methyl eclipsing interaction costs 6.0 kJ/mol, and a methyl-methyl eclipsing interaction costs 11 kJ/mol. What is the relative energy cost of the most stable conformer of 2,3-dimethylbutane? (a) 0 kJ/mol (b) 7.6 kJ/mol (C) 8.6 kJ/mol (d) 11.4 kJ/mol Correct ans (B) 7.6kJ/mol Please provide detailed solution? tests, examples and also practice NEET tests.
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