Byju's Answer
Standard XII
Chemistry
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
B
H
a
The homolytic cleavage of
C
−
H
a
will produce the most stabilised radical. Hence, minimum energy will be required.
Suggest Corrections
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Similar questions
Q.
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
in Column
K
is
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
≡
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
−
−
→
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
bond in
(
C
H
3
)
3
C
B
r
.
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