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InterviewSolution
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Which of the following compounds will give racemic mixture on nucleophillic substitution by `OH^(-)` ion? A. (i)B. (i), (ii) and (iii)C. (ii) and (iii)D. (i) and (iii) |
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Answer» Correct Answer - A A mixture containing two enantiomers in equalimolar amount have zero optical rotation, as the rotation due to one isomer is cancelled by the rotation due to other isomer. Such a mixture is known as racemic mixture. All those compounds which follow `S_(N)2` mechanism during nucleophilic substitution reaction form racemic mixture. Order of reactivity of alkyl halides towards `S_(N)1`. and reactions as follows: Tertiary halide, secondary halide, primary halide, `CH_(3)`X For `S_(N)1` reaction Thus, `CH_(3)-underset(C_(2)H_(5))underset(|)overset(***)CH-Br` contains a chiral carbon and gives a racemic product. Hence, option (a) is correct |
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