Reactivity order of alkenes towards electroph | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

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

Vedclass · Accepted Answer

$III > II > I > IV$

Vedclass · Answer

(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:
$I: CH_2=CH_2$
$II: CH_3-CH=CH_2$
$III: CH_3-C(CH_3)=CH_2$
$IV: CH_2=CH-Cl$

Similar Questions

Ozonolysis of an alkene with molecular formula $C_9H_{18}$ yields $2, 2-$ dimethylpropanal and $2-$ butanone. The alkene is ....................

Which of the following is the most stable?

"The negative part of the addendum adds on to the carbon atom linked with the least number of hydrogen atoms." This statement is called:

Propene when heated with chlorine at about $500 \, ^oC$ forms

The percentage composition of an organic compound $A$ is: carbon = $85.71 \%$ and hydrogen = $14.29 \%$. Its vapour density is $14$. Consider the following reaction sequence:
$A$ $\xrightarrow{Cl_2/H_2O} B$ $\xrightarrow[(ii) H_3O^+]{(i) KCN/EtOH} C$
Identify $C$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

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$