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A solution of (−)-1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of -

1. carbocation
2. free radical
3. carbanion
4. carbene

Correct answer: carbocation

Solution

The presence of SbCl5 facilitates the formation of a carbocation by stabilizing the positive charge, allowing for the racemization process to occur as the molecule can interconvert between enantiomers.

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