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Which of the following will have a mesoisomer also -  
 [AIEEE-2004]
  • a)
    2 - Chlorobutane
  • b)
    2, 3 - Dichlorobutane
  • c)
    2,3 - Dichloropentane
  • d)
    2-Hydroxypropanoic acid
Correct answer is option 'B'. Can you explain this answer?
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Which of the following will have a mesoisomer also -[AIEEE-2004] a)2 -...
Explanation:


Meso compounds are those which have an internal plane of symmetry and possess chiral centers. Therefore, the compound should have at least two chiral centers to exhibit meso isomerism.


Option A: 2-Chlorobutane does not have any chiral centers, so it cannot exhibit meso isomerism.


Option B: 2,3-Dichlorobutane has two chiral centers and also a plane of symmetry passing through the middle of the molecule, dividing it into two identical halves. Hence, it exhibits meso isomerism.


Option C: 2,3-Dichloropentane has three chiral centers and does not possess any plane of symmetry. Hence, it cannot exhibit meso isomerism.


Option D: 2-Hydroxypropanoic acid has one chiral center and does not possess any plane of symmetry. Hence, it cannot exhibit meso isomerism.


Therefore, the correct option is B. 2,3-Dichlorobutane will have a meso isomer as it has a plane of symmetry and two chiral centers.
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Which of the following will have a mesoisomer also -[AIEEE-2004] a)2 - Chlorobutaneb)2, 3 - Dichlorobutanec)2,3 - Dichloropentaned)2-Hydroxypropanoic acidCorrect answer is option 'B'. Can you explain this answer?
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