Reactivity order of alkenes towards electroph | vedclass

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(A) The reactivity of alkenes towards electrophilic addition reactions is directly proportional to the electron density of the double bond. Higher ele

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$III > II > I > IV$

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(A) The reactivity of alkenes towards electrophilic addition reactions is directly proportional to the electron density of the double bond. Higher electron density makes the alkene more nucleophilic,facilitating the attack of an electrophile.$1$. In $CH_3-C(CH_3)=CH_2$ $(III)$,there are two electron-donating methyl groups ($+I$ effect and hyperconjugation),which significantly increase the electron density on the double bond.$2$. In $CH_3-CH=CH_2$ $(II)$,there is one electron-donating methyl group,which increases the electron density compared to ethene.$3$. In $CH_2=CH_2$ $(I)$,there are no electron-donating groups.$4$. In $CH_2=CH-Cl$ $(IV)$,the chlorine atom exerts a strong $-I$ (inductive) effect,which decreases the electron density on the double bond,making it the least reactive.Therefore,the order of reactivity is $III > II > I > IV$.

Reactivity order of alkenes towards electrophilic addition reaction:
$I: CH_2=CH_2$
$II: CH_3-CH=CH_2$
$III: CH_3-C(CH_3)=CH_2$
$IV: CH_2=CH-Cl$

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Reactivity order of alkenes towards electrophilic addition reaction:$I: CH_2=CH_2$$II: CH_3-CH=CH_2$$III: CH_3-C(CH_3)=CH_2$$IV: CH_2=CH-Cl$