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Separating of d and l enantiorphs from a...

Separating of d and l enantiorphs from a racemic mixture is called

A

Resolution

B

Dehydration

C

Rotation

D

Dehydrohalogenation

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The correct Answer is:
A
The separation of a racemic mixture into its constituent enantiomers, is called chiral resolution. This can be achieved by crystallization, chromatography etc.
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A schematic analysis of the reaction of the enantiomer with racemic mixture is shows below: {:(d,+,"d and l",rarr,(d)-(d)),("The(+)-form of",,"A racemic mixture of",,+),("chiral molecules",,"other molecules with",,(d)-(l)),(,,50%(d) and 50%(l),,):} The products (d-d) and (d-l) are clearly neither identical nor enantiomers (non-superimposable mirror images) as the diastereomers, stereoisomers that are not mirror images' . The formation of diasteromers allows the separation of enantiomers (called resolution) which is not easy as enantiomers have identical physical properties. One general 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. How many diastereomers are possible among all the possible stereoisomers of 2,3-dibromopentane ?

A schematic analysis of the reaction of the enantiomer with racemic mixture is shows below: {:(d,+,"d and l",rarr,(d)-(d)),("The(+)-form of",,"A racemic mixture of",,+),("chiral molecules",,"other molecules with",,(d)-(l)),(,,50%(d) and 50%(l),,):} The products (d-d) and (d-l) are clearly neither identical nor enantiomers (non-superimposable mirror images) as the diastereomers, stereoisomers that are not mirror images' . The formation of diasteromers allows the separation of enantiomers (called resolution) which is not easy as enantiomers have identical physical properties. One general 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 ?

ERRORLESS-GENERAL ORGANIC CHEMISTRY -NCERT BASED QUESTIONS (Structural and Stereo Isomerism )
  1. Reason for geometrical isomerism shown by 2- butene is

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  2. The most stable geometrical isomer among the following is

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  3. Separating of d and l enantiorphs from a racemic mixture is called

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  4. Number of optical isomers of lactic acid are

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  5. Meso-tartaric acid is optically inactive due to the presence of

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  6. Which of the following compounds is not chiral

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  7. Which of the following compounds is an optically active compound

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  8. d-tartaric acid and l-tartric acid are

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  9. Stereoisomers which are not mirror image of each other, are called.:

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  10. Consider the following organic compound overset(1)CH(3)overset(2)CH(...

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  11. If the light waves pass through a nicol prism then all the oscillation...

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  12. Disymmetrical object is one which image

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  13. What is the possibel number of optical isomer for a compound containin...

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  14. A compound whose molecule is superimposabel on its mirror image despit...

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  15. Which of the following compounds is expected to be optically active ?

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  16. Which will show optical isomerism

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  17. The optically active molecule is

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  18. Which among the following functional groups has been given the hig...

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  19. Which of the following is optically active

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  20. The configuration of the chiral centre and the geometry of the double ...

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