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Which of the ...

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Which of the following is the enantiomer of the following substance?

A

It does not have a non-superposable enantiomer

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B

I

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C

II

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D

III

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Solution

The correct option is A It does not have a non-superposable enantiomer
Enantiomers are non-superimposable mirror images of each other so they are chiral molecules. A given compound is achiral. So it does not have enantiomer.

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A schematic analysis of the reaction of one enantiomer with racemic mixture is shown below

\begin{matrix} d & + & d a n d l & \to & (d) - (d) T h e (+) f o r m o f & A r a c e m i c m i x t u r e o f & + c h i r a l m o l e c u l e s & o t h e r m o l e c u l e s w i t h & (d) - (l) 50 % (d) a n d 50 % (l) \end{matrix}

The products (d-d) and (d-l) are clearly neither identical nor enantiomers (non-superimposable mirror images) as the mirror image of (d-d) is (l-l) not (d-l). They are diastereomers, 'stereoisomers that are not mirror images'.

The formation of diastereomers allows the separation of enantiomers (called resolution) which is not easy as enantiomers have identical physical properties. One general procedure for separating enantiomers is to allow them to react with naturally occurring chiral molecule to form a pair of diastereomers. These can be separated easily as they have different physical properties. if the original chemical reaction can be reversed, the enantiomers can be isolated.

Which of the following is an example of diastereomers?

Which of the following is not true about enantiomer

Q. Which of the following is not a pair of enantiomers?

Which of the following is not applicable to enantiomers?

Q. Which of the following is NOT true for enantiomers?

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