Some Basic Principles Of Organic Chemistry Question 364

Question: The number of possible enantiomeric pairs that can be produced during mono-chlorination of 2-methylbutane is [Pb. CET 2004]

Options:

A) 3

B) 4

C) 1

D) 2

Show Answer

Answer:

Correct Answer: D

Solution:

C1,H3C2|,HCH3 ,C3,H2C4,H3 Its monochloro derivatives are as follows : (i) ClCH2C|,HCH3 ,,CH2CH3 or CH3C|,HCH2CH2Cl     ,,CH3 It will exist as enantiomeric pair (d and l-forms) (ii) CH3C||,Cl ,CH2CH3    ,,CH3 no asymmetric C atom (iii) CH3C|,HCH3,,C|,HCl ,CH3 It will exist as enantiomeric pair (d- and l-forms) (iv) CH3C|,HCH3 ,CH2CH2Cl No asymmetric carbon atom Hence, only two enantiomeric pairs will be obtained by the monochlorination of 2-methylbutane.



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