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- IIT JAM
- Chemistry (CY)
Select the incorrect statement about the product mixture in the following reaction: b products ccl4 64. (b) it is racemic mixture (d) it is a mixture of erythro
Select the incorrect statement about the product mixture in the following reaction: B Products CCl4 64. (b) it is racemic mixture (d) it is a mixture of erythro compounds (a) it is optically active (c) it is a resolvable mixture In the aiven reaction:
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Amol ashok pawar Best Answer
Option a
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i couldn't understand
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First of all it is erythro which is correct. second it is resolvable as different alkyl gr attached so option c is also correct as for option b it's racemic which means both dl pairs are possible so option b is also correct.
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for option a it is optically active which is incorrect as a racemate is optically inactive hence option a is incorrect
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but in the diagram it is saying the compound is optically active?
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yes because it states the incorrect statement
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are optically inactive molecule resolvable?
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yes
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so optically active compound are not resolvable?
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they both are resolvable but racemic mixtures dl pair have a plane of symmetry which makes them optically inactive
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how to know if a molecule is resolvable or not?
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There’s no way to know, a priori, whether any of the common resolution methods (crystallization, chiral derivatizing agents, or chiral column chromatography) will work on a particular racemic mixture. hope this helps
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the product have two chiral centre so it is definitely resolvable
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Ashutosh singh
Let me explain this to you in a very lucid way, my Friend! See, this molecule is optically inactive due to internal compensation which is nothing but two chiral centres within a molecule with opposite and equal rotations.
Racemic mixture is always optically inactive!
sir i guess this molecule is optically inactive due to external compensation not internal.
Yes, Sourav. 😊 External compensation...you are right, absolutely. 😊