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Chiral Centres and Chirality

The proton wh...

Question

The proton which requires the least energy for a homolytic bond cleavage of $C - H$ is:

A

H_{a}

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B

H_{b}

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C

H_{c}

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D

All have equal energy

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Solution

The correct option is A $H_{a}$
The homolytic cleavage of $C - H_{a}$ will produce the most stabilised radical. Hence, minimum energy will be required.

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Similar questions

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

Q. The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below:

Correct match of the

C-H

bonds (shown in bold) in Column J with their

BDE

K

Column $J$ Molecule	Column $K$ $B D E (k c a l m o l^{- 1})$
(P) $H - C H (C H_{3})_{2}$	(i) $132$
(Q) $H - C H_{2} P h$	(ii) $110$
(R) $H - C H = C H_{2}$	(iii) $95$
(S) $H - C \equiv C H$	(iv) $88$

Q. The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below:

For the following reaction

C H_{4} (g) + C l_{2} (g) light - - \to C H_{3} C l (g) + H C l (g)

The correct statement is

Q. The reaction intermediate produced by homolytic cleavage of a bond is called

Q. Predict the products formed due to the homolytic cleavage of the

C - B r

(C H_{3})_{3} C B r

.

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