Alkyl Halides - Result Question 28
####28. An $S _N 2$ reaction at an asymmetric carbon of a compound always gives
(2001)
(a) an enantiomer of the substrate
(b) a product with opposite optical rotation
(c) a mixture of diastereomers
(d) a single stereoisomer
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Answer:
Correct Answer: 28. (d)
Solution:
- $S _N 2$ reaction at asymmetric carbon occur with inversion of configuration and a single steroisomer is formed because the reactant and product are not enthtiomer. Therefore the sign of optical rotation may or may not change.
