Question:
Order of reactivity towards nucleophilic substitution reaction of the compounds
is
Order of reactivity towards nucleophilic substitution reaction of the compounds
is
Updated On: Jun 14, 2022
- i > ii > iii > iv
- ii > i > iii > iv
- iv > iii > ii > I
- iii > iv > ii > i
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The Correct Option is C
Solution and Explanation
Nucleophile attacks readily to the compound that has least electron density. Electron withdrawing groups like $- Cl , NO _{2}$ etc decrease the electron density while electron releasing groups like $NMe _{2}$ increase the electron density at benzene nucleus.
Compound (iv) due to the presence of four electron withdrawing groups has the least electron density and thus, is more reactive towards nucleophilic substitution.
Hence, the correct order of reactivity towards nucleophilic substitution is as
Compound (iv) due to the presence of four electron withdrawing groups has the least electron density and thus, is more reactive towards nucleophilic substitution.
Hence, the correct order of reactivity towards nucleophilic substitution is as
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Concepts Used:
Hydrocarbons - Reaction Mechanism
Hydrocarbons are organic compounds that are entirely made up of only two kinds of atoms – carbon and hydrogen. Typically, hydrocarbons are colourless gases that have very weak odours.
Mechanism of electrophilic substitution reactions:
According to experimental evidences, SE (S = substitution; E = electrophilic) reactions are supposed to proceed via the following three steps:
- Generation of the electrophile
- Formation of carbocation intermediate
- Removal of proton from the carbocation interm