InterviewSolution
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InterviewSolution
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The rate of the reaction is influenced by the hyperconjugation effect of group R. If R is sequentially `CH_(3)^(-)` (II) `CH_(3)-CH_(2)` (III) `CH_(3)-underset(CH_(3))underset(|)CH-` , (IV) `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-` the increasing order of speed of above reaction isA. IV,III,II,IB. I,II,III,IVC. I,IV,III,IID. III,II,I,IV |
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Answer» Correct Answer - B More the number of H atoms on the `alpha` carbon of the group R, more are the hyper conjugation structures, weaker is the C-B bond and hence higher is the rate of reaction. Now since `CH_(3)` has three, ethyl has two, iso- propyl has one and tert butyl group has no `alpha`-hydrogen, therefore, hyper conjugation effect decreases and hence the rate decreases in the same order (B), is correct |
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