Question

Identify all the optically active isomers of 2,3 dichlorobutane with adequate exlplaination

Answer 1

There are three stereoisomers of 2,3-dichlorobutane.

Explanation:

The structure of 2,3-dichlorobutane is

CH

3

*

C

HCl

*

C

HClCH

3

The two carbon atoms marked with blue asterisks are chiral centres.

The maximum number of stereoisomers is

2

n

, where

n

is the number of chiral centres.

Since

=

2

, the maximum number of stereoisomers is

2

2

=

4

.

Structures 1 and 2 are two different nonsuperimposable mirror images of each other.

But Structures 3 and 4 are meso compounds.

They are superimposable on each other, so they are the same compound.

So, there are only three stereoisomers of 2,3-dichlorobutane.

Answer 2

Explanation:

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