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The Aldol Addition

0-Toluic acid...

Question

o-Toluic acid on reaction with $B r_{2} + F e$ gives:

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 C
$- C H_{3}$ is o,p-directing and $- C O O H$ is m-directing for electrobilic substitution.
Both these effects reinforce each other and hence substitution occus at position $p -$ to $C H_{3}$ and $m -$ to $C O O H$ group, i.e., option (c) is correct.

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Q. The relative acidic strengths of benzoic acid, o-toluic acid, and p-toluic acid in decreasing order can be given as:

{M n O}_{4}^{-} + {B r}^{-} \to {M n}^{2 +} + {B r}_{2}

(in acidic medium)

Comment on the above reaction.

B r O_{3}^{-}

ion reacts with

{B r}^{-}

in acidic medium,

{B r}_{2}

is liberated. The equivalent weight

{B r}_{2}

in this reaction is :

{B r O_{3}}^{-}

ion reacts with

B r^{-}

B r_{2}

, in acid medium. The equivalent mass of

B r_{2}

in this reaction is:

B r O_{3}^{-}

ion reacts with

{B r}^{-}

in acid medium,

{B r}_{2}

is liberated. The equivalent weight of

{B r}_{2}

in this reaction is:

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