1.

How many optically active stereomers are possible for butane - 2,3- diol ?

Answer»

3
4
1
2

Solution :
No. of asymmetric or chiral carbon= 2
THEREFORE no. of OPTICAL ISOMERS `=2^(n)=2^(n)=4`
No . Ofoptically ACTIVE steremers `=4-1=3`, because SESO compound is optically inactive due to internal compensation.


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