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Standard XII
Chemistry
Synthesis of Aldehydes and Ketones Using Carboxylic Acid and Its Derivatives
Account for t...
Question
Account for the following:
(a) Aromatic carboxylic acids do not undergo Friedel-Crafts reaction.
(b)
p
K
a
value of 4-nitrobenzoic acid is lower than that of benzoic acid.
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Solution
(a) This is because the -COOH group is deactivating and the catalyst
A
l
C
l
3
gets bonded to -COOH group.
(b)
−
N
O
2
group is an electron withdrawing group owing to -I effect. So it stabilises the
C
O
O
−
ion and strengthens the acid in 4-nitrobenzoic acid.
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Similar questions
Q.
Account for the following:
(a) Aromatic carboxylic acids do not undergo Friedel-Crafts reaction.
(b)
p
K
a
value of 4-nitrobenzoic acid is lower than that of benzoic acid.
Q.
Account for the following.
Aromatic carboxylic acids do not undergo Friedel-Crafts reaction.
Q.
Benzoic acid do not undergo Friedel Crafts reactions. Why?
Q.
Carboxylic acid does not give friedel-craft Reaction?
Q.
Benzoic acid does not undergo Friedel-Crafts reaction due to ------ of the benzene ring by the ------ effect of
−
C
O
O
H
group.
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Synthesis of Aldehydes and Ketones Using Carboxylic Acid and Its Derivatives
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