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In which of the following, gauche form is more stable than anti form of conformers?
- a)CH3CH(F)CH(OH)CH3
- b)CH3CH(F)CH2CH2OH
- c)CH3CH2CH2CH3
- d)CH3CH(Cl)CH(Cl)CH3
Correct answer is option 'A'. Can you explain this answer?
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In which of the following, gauche form is more stable than anti form o...
Gauche form can be more stable when intramolecular H-bonding occurs.
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In which of the following, gauche form is more stable than anti form o...
Understanding Conformers
Conformers are different spatial arrangements of the same molecule due to rotation around single bonds. The stability of these conformers can be influenced by steric hindrance, torsional strain, and electronic effects.
Gauche vs. Anti Forms
- Gauche Form: Involves adjacent substituents that can engage in stabilizing interactions.
- Anti Form: Involves substituents positioned opposite each other, often leading to increased steric hindrance.
Analysis of Option A: CH3CH(F)CH(OH)CH3
- Substituents: The gauche conformer has a fluorine atom (F) and a hydroxyl group (OH) positioned 60 degrees apart.
- Stabilizing Interactions: The close proximity of F and OH allows for intramolecular hydrogen bonding, which stabilizes the gauche conformation.
- Steric Considerations: The anti form places the F and OH groups 180 degrees apart, which increases steric interactions with nearby hydrogen atoms, making it less stable.
Comparison with Other Options
- Option B: CH3CH(F)CH2CH2OH: The anti form may be more stable due to lesser steric strain and more rotational freedom.
- Option C: CH3CH2CH2CH3: Both forms are similar in stability, as there are no significant steric factors.
- Option D: CH3CH(Cl)CH(Cl)CH3: Steric interactions in the anti form would likely make it more stable.
Conclusion
In conclusion, option A (CH3CH(F)CH(OH)CH3) is unique as the gauche form benefits from stabilizing interactions, making it more favorable than the anti form.
Conformers are different spatial arrangements of the same molecule due to rotation around single bonds. The stability of these conformers can be influenced by steric hindrance, torsional strain, and electronic effects.
Gauche vs. Anti Forms
- Gauche Form: Involves adjacent substituents that can engage in stabilizing interactions.
- Anti Form: Involves substituents positioned opposite each other, often leading to increased steric hindrance.
Analysis of Option A: CH3CH(F)CH(OH)CH3
- Substituents: The gauche conformer has a fluorine atom (F) and a hydroxyl group (OH) positioned 60 degrees apart.
- Stabilizing Interactions: The close proximity of F and OH allows for intramolecular hydrogen bonding, which stabilizes the gauche conformation.
- Steric Considerations: The anti form places the F and OH groups 180 degrees apart, which increases steric interactions with nearby hydrogen atoms, making it less stable.
Comparison with Other Options
- Option B: CH3CH(F)CH2CH2OH: The anti form may be more stable due to lesser steric strain and more rotational freedom.
- Option C: CH3CH2CH2CH3: Both forms are similar in stability, as there are no significant steric factors.
- Option D: CH3CH(Cl)CH(Cl)CH3: Steric interactions in the anti form would likely make it more stable.
Conclusion
In conclusion, option A (CH3CH(F)CH(OH)CH3) is unique as the gauche form benefits from stabilizing interactions, making it more favorable than the anti form.
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In which of the following, gauche form is more stable than anti form of conformers?a)CH3CH(F)CH(OH)CH3b)CH3CH(F)CH2CH2OHc)CH3CH2CH2CH3d)CH3CH(Cl)CH(Cl)CH3Correct answer is option 'A'. Can you explain this answer?
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In which of the following, gauche form is more stable than anti form of conformers?a)CH3CH(F)CH(OH)CH3b)CH3CH(F)CH2CH2OHc)CH3CH2CH2CH3d)CH3CH(Cl)CH(Cl)CH3Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In which of the following, gauche form is more stable than anti form of conformers?a)CH3CH(F)CH(OH)CH3b)CH3CH(F)CH2CH2OHc)CH3CH2CH2CH3d)CH3CH(Cl)CH(Cl)CH3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In which of the following, gauche form is more stable than anti form of conformers?a)CH3CH(F)CH(OH)CH3b)CH3CH(F)CH2CH2OHc)CH3CH2CH2CH3d)CH3CH(Cl)CH(Cl)CH3Correct answer is option 'A'. Can you explain this answer?.
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