A solution of ( + )-1-chloro-1-phenylethane in t toluene racemises slowly in the presence of a small amount of `SbCl_(5)` due to the formation of

Question

A solution of ( + )-1-chloro-1-phenylethane in t toluene racemises slowly in the presence of a small amount of `SbCl_(5)` due to the formation of

A solution of ( + )-1-chloro-1-phenylethane in t toluene racemises slowly in the presence of a small amount of `SbCl_(5)` due to the formation of
A. a carbene
B. a carbocation
C. a free radical
D. a carbanion.

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - B
A solution of (+)-2-chloro-1-phenyIethane in toluene racemises slowly in the presence of `SbCl_(5)` due to the formation of a carbocation intermediate as shown below.
`underset("1-CHloro-1-phenylethane A carbocation")underset()(CH_(3)-overset(Cl)overset(|)CH-C_(6)H_(5)+SbCl_(5)rarr[CH_(3)-overset(+)CH-C_(6)H_(5)]+[SbCl_(6)]^(-))`
Since the carbocation is planar, it can be attacked by `[SbCl_(6)]^(-)` from either side, thereby producing a racemic mixture of 1-chloro-1 phenylethane.