Write structural formula of the compounds A to D . C 6 H 5 NO 2 → conc . H 2 SO 4 conc . HNO 3 A → NaSH B → 50 % Ethanol , ∆ Zn + NH 4 Cl C → Tollen ' s reagent D

Nitrobenzene already contains a nitro-group. Nitro group is an electron withdrawing group. Therefore, it is a meta directing group. Hence the attachment of a new nitro group occurs in the meta position. Hence the product will be meta-dinitrobenzene. The reaction is shown in the figure. m-dinitrobenzene reacts with NaSH and forms m-nitroaniline. Zinc dust and ammonium chloride convert nitrobenzene to the corresponding hydroxylamine. C 6 H 4 NH 2 - NHOH reduces Tollens reagent (ammoniacal silver nitrate solution) to silver metal and itself is oxidized to C 6 H 4 NH 2 - N = O . C 6 H 4 NH 2 - NO 2 B → 50 % Ethanol , ∆ Zn + NH 4 Cl C 6 H 4 NH 2 - NHOH C → Tollen ' s reagent C 6 H 4 NH 2 - N = O D

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Important Questions on Amines

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following amines can be prepared by Gabriel phthalimide reaction?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following statements is incorrect in case of Hofmann bromamide degradation?

MEDIUM

Chemistry>Organic Chemistry>Amines>Preparation of Amines

In the Hoffmann bromamide degradation reaction, the number of moles of

NaOH

and

B r_{2}

used per mole of amine produced are:

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Identify the amine formed when ethyltrimethyl ammonium iodide is treated with silver hydroxide and further heated strongly

MEDIUM

Chemistry>Organic Chemistry>Amines>Preparation of Amines

The electrolytic reduction of nitrobenzene in strongly acidic medium produces:

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Ethylamine

(C_{2} H_{5} N H_{2})

can be obtained from N-ethylphthalimide on treatment with:

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following reaction is appropriate for converting acetamide to methanamine?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following compounds can be prepared in good yield by Gabriel phthalimide synthesis ?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which one of the following nitro-compounds does not react with nitrous acid?

HARD

Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following shows the CORRECT reaction for nitrobenzene reduction ?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which one of the following can be prepared by Gabriel phthalimide synthesis?

HARD

Chemistry>Organic Chemistry>Amines>Preparation of Amines

Write structural formula of the compounds $A$ to $D$ .

$C_{6} H_{5} {NO}_{2} \to_{conc . H_{2} {SO}_{4}}^{conc . {HNO}_{3}} A \overset{NaSH}{\to} B \to_{50 % Ethanol, ∆}^{Zn + {NH}_{4} Cl} C \overset{Tollen' s reagent}{\to} D$

HARD

Chemistry>Organic Chemistry>Amines>Preparation of Amines

The best reagent for converting,

2 -

phenylpropanamide into

1 -

phenylethanamine is _____.

MEDIUM

Chemistry>Organic Chemistry>Amines>Preparation of Amines

Which of the following is not a correct method of the preparation of benzyl amine from cyano benzene?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

The most appropriate reagent for conversion of

C_{2} H_{5} CN

into

{CH}_{3} {CH}_{2} {CH}_{2} {NH}_{2}

is :

HARD

Chemistry>Organic Chemistry>Amines>Preparation of Amines

Starting from propanoic acid, the following reactions were carried out
Propanoic acid $\overset{{SOCl}_{2}}{⟶} X \overset{{NH}_{3}}{⟶} Y ⟶ Z_{2} + KOH \to Z$

What is the compound $Z$ ?

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

Reaction of propanamide with ethanolic sodium hydroxide and bromine will give

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

An aromatic compound

' A'

having molecular formula

C_{7} H_{6} O_{2}

, on treating with aqueous ammonia and heating forms compound

' B'

. The compound

' B'

on reaction with molecular bromine and potassium hydroxide provides compound

' C'

having molecular formula

C_{6} H_{7} N

. The structure of

' A'

is:

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Chemistry>Organic Chemistry>Amines>Preparation of Amines

In the reaction given below, $X$ is

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MEDIUM

Chemistry>Organic Chemistry>Amines>Preparation of Amines

The product obtained when nitrobenzene is reduced using

Zn / NaOH

is:

Important Questions on Amines

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