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Synthesis by Reduction of Nitro Compounds

For this coup...

Question

For this coupling reaction, which of the following conditions is most suitable?

A

Strongly acidic

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B

Strongly alkaline

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C

Slightly alkaline

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D

Neutral

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Solution

The correct option is A Strongly alkaline
Solution:- (B) Strongly alkaline
The reaction takes place in strongly alkaline medium and the product formed is para-hydroxyazobenzene (orange dye).

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Which of the following conditions is most suitable for the above reaction?

Q. Treatment of primary amines with nitrous acid gives diazonium ions, which decompose under the diazotization conditions to give a complex mixture of products. Aryldiazonium ions are stable and is a valuable intermediate. They react with activated aromatic compounds to give a coupling product.

Which of the following diazonium ion is the most reactive towards an azo coupling reaction?

The equilibrium constant for the following reaction is:

$2 F e^{3 +} 3 I^{⊖} ⇌ 2 F e^{2 +} + I_{3}^{⊖}$

The standard reduction potential in acidic conditions is

0.78 V

0.54 V

, respectively, for

F e^{3} + | F e^{2 +} a n d I_{3}^{⊖} | I^{⊖}

Q. Which of the following conditions are necessary to form a couple?

Q. The increasing order of reactivity of these diazonium ions in azo-coupling reaction (under similar conditions) will be:

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Synthesis by Reduction of Nitro Compounds

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