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Which of the ...

Question

Which of the following may be separated by ordinary physical methods?

A

A pair of identical molecules

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B

A pair of enantiomers

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C

A pair of diastereomers

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D

A pair of identical atoms

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Solution

The correct option is A A pair of diastereomers
A pair of diastereoisomers can be separated by ordinary physical methods but exantiomers cannot be separated.Enantiomers are separated with help of pure compound.Enantiomers are compounds that differ only in sign of rotation value rest properties are same.

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Similar questions

Q. Indicate whether each of the following pairs are identical, enantiomers or diastereomers:

Q. For each of the following pair, deduce the stereochemical relationship, i.e., whether they are enantiomers, diastereomers or identical.

Q. The correct sequence of relationships between the compounds of pairs (i) - (iv) respectively is:

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?

Q. Consider the following pairs of structures. Identify the relationship between them by describing them as representing enantiomers, diastereomers, consitutional isomers, or two molecules of the same compound.

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