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Regarding 1,n-elimination (intramolecular cyclization), which ring size is formed fastest under pureReaction Mechanism Chemistry Question

Question

Regarding 1,n-elimination (intramolecular cyclization), which ring size is formed fastest under purely kinetic control due to the high collision probability of the chain ends?

Answer: A

💡 Solution & Explanation

Even though highly strained and thermodynamically unstable, the 3-membered ring forms fastest because the reacting groups are extremely close to one another.

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