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In an SN1 reaction on chiral centres there is:

1. 100% racemization
2. Inversion more than retention leading to partial racemization
3. 100% retention
4. 100% inversion

Correct answer: Inversion more than retention leading to partial racemization

Solution

In an SN1 reaction, the intermediate is a planar carbocation, which allows attack from both sides. This leads to partial racemization, with inversion being slightly more favored due to steric factors.

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