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Which of the following statements are co...

Which of the following statements are correct regarding relative stability of conformations of ethane?
I.There is minimum repulsive force and maximum stability of molecule in the case of staggered form
II.There are maximum repulsive force and minimum stability of molecule in case of eclipsed form
III.Due to repulsive force eclipsed form possesses more energy as compared to staggered form.
Choose the correct option.

A

II and III

B

I and II

C

I and III

D

All of the above

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct statements regarding the relative stability of conformations of ethane, we need to analyze the staggered and eclipsed forms of ethane. ### Step-by-Step Solution: 1. **Understanding Ethane Conformations**: Ethane (C2H6) can adopt different conformations due to rotation around the carbon-carbon single bond. The two primary conformations are staggered and eclipsed. 2. **Staggered Conformation**: In the staggered conformation, the hydrogen atoms on adjacent carbons are positioned as far apart as possible. This arrangement minimizes the repulsive forces between electrons in the bonds, leading to a more stable configuration. - **Statement I**: "There is minimum repulsive force and maximum stability of molecule in the case of staggered form." - **Evaluation**: This statement is correct. The staggered form indeed has minimum repulsion and maximum stability. 3. **Eclipsed Conformation**: In the eclipsed conformation, the hydrogen atoms on adjacent carbons are aligned with each other. This alignment results in increased electron-electron repulsion, leading to a less stable configuration. - **Statement II**: "There are maximum repulsive force and minimum stability of molecule in case of eclipsed form." - **Evaluation**: This statement is also correct. The eclipsed form has maximum repulsion and minimum stability. 4. **Energy Comparison**: The energy of the eclipsed form is higher than that of the staggered form due to the increased repulsive forces. - **Statement III**: "Due to repulsive force eclipsed form possesses more energy as compared to staggered form." - **Evaluation**: This statement is correct as well. The eclipsed conformation is indeed higher in energy compared to the staggered conformation. ### Conclusion: All three statements are correct regarding the relative stability of conformations of ethane. ### Final Answer: All statements (I, II, and III) are correct. ---
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