Shib Sagar posted an Question
September 21, 2020 • 07:20 am 30 points
  • IIT JAM
  • Chemistry (CY)

Please solve this problem

64. Write the decreasing order of reactivity towards electrophilic

2 Answer(s) Answer Now
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    Dinesh khalmaniya 1 best-answer

    option A

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    more the hyperconjugation, more is the rate of Electrophilic addition reaction as the nucleophilicity of alkene increase

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    here number of alpha H are 2,9,8,3 in option i,ii,iii,iv respectively

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    option iii have maximum number of alpha H i e., 9 so it has maximum number of h6perconjugating structure makes it more nucleophilic for the attack of electrophile

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    so the order is II>III>IV>I

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    option A is absolutely correct

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    Priyanshu kumar Best Answer

    Option A is correct

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    II>III>IV>I

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    As in elelctrophilic addition reaction carbocation intermediate is formed which is stabilised by electron donating group means +I and +M

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    In case of Methyl group hyperconjugation increases stability and more the alpha hydrogen more the hyperconjugating structure more is the reactivity

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    In case of 2 9 alpha hydrogen is there, In 3rd 8 alpha hydrogen

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    In case of I two alpha hydrogen and in case of IV 3 alpha hydrogen...

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    So overall reactivity order 2>3>4>1

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