MCQ
Which of the following will have least hindered rotation about carbon-carbon bond
- ✓Ethane
- BEthylene
- CAcetylene
- DHexachloroethane
✓
Answer
Correct option: A.
Ethane
a
(a) Free rotation around carbon-carbon bond takes place easily in alkanes. Now ethane and hexachloroethane both are alkanes. But in hexachloroethane bulky chlorine atom hinders the rotation. Therefore least hindered rotation takes place in ethane.
(a) Free rotation around carbon-carbon bond takes place easily in alkanes. Now ethane and hexachloroethane both are alkanes. But in hexachloroethane bulky chlorine atom hinders the rotation. Therefore least hindered rotation takes place in ethane.
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