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Question

Which of the following cleavage of bond can result in Homolytic Cleavage?



A

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B

 

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C

 

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D

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Solution

The correct option is B

 


What do you mean by Homolytic Cleavage?

Homolytic Fission:

Occurs in gas phase or in non-polar solvents and is catalysed by reagents. In such fission free radicals are formed. Here the bond pair is equally shared after the fission.

AB  A0 + B0                                     (free radicals)

Condition for Homolytic Bond Fission : Homolysis takes place in the presence of peroxide, UV light, heat ( 500C), electricity and free radical. The process is known as initiation of free radical reaction.

A:B  (i)Peroxide−−−−−−−−  A0+B0

           (ii) hv
           (iii) Δ
            (iv) Electricity or
            (v) Free radical

CH3  H  hv  .CH3 + .H
                            methyl free radical

So, one of the necessary condition is:
It should be non - polar.
If there will electronegative difference, the compound will be polar.
In Cl  Cl and CH3H, they both are non polar, hence Homolytic fission. 


Chemistry

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