Which of the following is not a correct relation with respect to isomerism?

are diastereomers as they are not mirror image of each other

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are functional isomers

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are metamers

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are enantiomers

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Solution

The correct option is A are diastereomers as they are not mirror image of each other
(a) Given compounds have the same empirical formula but different positions of substituents. So, they are positional isomers.
(b) $1^{o}, 2^{o}$ and $3^{o}$ amines are functional isomers.
(c) These are metamers as molecular formula is same, the only difference is the number of carbon atoms (alkyl groups) on either side of the functional group.
(d)

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Similar questions

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?

A pair of stereoisomers might be classified in various ways. Which of the following statement are true with respect to pairs of stereoisomers?
(a) They might be configurational isomers
(b) They might be diastereomers
(c) They might be constitutional isomers
(d) They might be tautomers
(e) They might be conformational isomers
(f) They might be enantiomers
(g) They might be positional isomers

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Q. Compounds which are not enantiomers are diastereomers – True or False?

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

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