In which of the following, homolytic bond fission takes place ?

Question

In which of the following, homolytic bond fission takes place ? (A) Alkaline hydrolysis of ethyl chloride (B) Addition of HBr to double bond (C) Free radical chlorination of methane (D) Nitration of Benzene

Tardigrade Admin · Accepted Answer

Free radical chlorination of methane Initiation
(1)

C l_{2} Light 2 C l^{∙}

Propagation
(2)

Cl + C H_{4} \to H Cl + C ∙ H_{3}

(3)

C H_{3} + C l_{2} \to C H_{3} Cl + C l^{∙}

Termination
(4)

2 C l^{∙} \to C l_{2}

Cl ∙ + ∙ C H_{3} \to C H_{3} Cl

2. C H_{3} \to C H_{3} C H_{3}

Q. In which of the following, homolytic bond fission takes place ?

Alkaline hydrolysis of ethyl chloride

Addition of HBr to double bond

Free radical chlorination of methane

Nitration of Benzene

Free radical chlorination of methane Initiation (1) Cl2​Light​2Cl∙ Propagation (2) Cl+CH4​→HCl+C∙H3​ (3)CH3​+Cl2​→CH3​Cl+Cl∙ Termination (4) 2Cl∙→Cl2​ Cl∙+∙CH3​→CH3​Cl 2.CH3​→CH3​CH3​

Free radical chlorination of methane Initiation
(1) $C l_{2} Light 2 C l^{∙}$
Propagation
(2) $Cl + C H_{4} \to H Cl + C ∙ H_{3}$
(3) $C H_{3} + C l_{2} \to C H_{3} Cl + C l^{∙}$
Termination
(4) $2 C l^{∙} \to C l_{2}$
$Cl ∙ + ∙ C H_{3} \to C H_{3} Cl$
$2. C H_{3} \to C H_{3} C H_{3}$