Question:

Which of the following species is not electrophilic in nature ?

Updated On: Jul 12, 2022

$\ce{ BH_3}$
$H_3\overset {\oplus}O $
$ \overset{\oplus}N O_2$
$\overset{\oplus}C l $

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The Correct Option is B

Solution and Explanation

Electrophones are electron deficient species. Among the given, $ {H_3O^{\oplus}}$has lone pair of electrons for donation, thus it is not electron deficient and hence, does not behave like an electrophone.

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Notes on Organic Chemistry- Some Basic Principles and Techniques

Concepts Used:

Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism

SN1 Reaction Mechanism:

S_N¹ reaction mechanism takes place by following three steps –

Formation of carbocation
Attack of nucleophile
Deprotonation

SN2 Reaction Mechanism:

The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.

Electrophilic Aromatic Substitution Reaction Mechanism:

The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:

A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
Due to the breaking of the C-H sigma bond, a proton is removed.
The C=C bond is reformed and it restores the aromaticity of the compound.

Electrophilic Substitution Reaction Mechanism:

The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.

Electrophile Generation
Carbocation Formation
Proton Removal