
Interpretation: The structures which have mirror image isomers needs to be determined
Concept Introduction: Optical isomers (Enantiomers) are mirror images of each other that are non-super-imposable.

Answer to Problem 8E
A chiral molecule or ion can exist in two stereoisomers. They are mirror images of each other. These isomers are known as enantiomers.
Explanation of Solution
The structure of butyric acid is as follows:
The non-superimposable mirror image of compound is given. Thus, they are optical isomers. Also, known as enantiomers.
The structure of ethyl formate is as follows:
The non-superimposable mirror image of compound is given. Thus, they are optical isomers. Also, known as enantiomers.
The structure of 2-butanol is as follows:
The non-superimposable mirror image of compound is given. Thus, they are optical isomers. Also, known as enantiomers.
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