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Amines

Short Answer Type

111.

Write the structure of the Zwitter ion of sulphanilic acid.

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112.

What happens when n-pentyl nitrite reacts with aniline in the presence of HCl in ice-cold solution?

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113.

Convert aniline into chlorobenzene.

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114.

Write the structures of A and B.

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115.

What is the structure of compound A?
$2 comma space 4 space nitro space benzene rightwards arrow from left parenthesis ii right parenthesis space anisole to left parenthesis straight i right parenthesis space NaNO subscript 2 plus HCl space 0 minus 4 degree straight C of straight A$

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116. How does the formation of 2° and 3° amines can be avoided during the preparation of 1° amine by alkylation?

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117.

Compare the reactions of MeN and Ph₃N with BF_3.

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118.

Why is it preferred to use methanol (and not methyl iodide HCHO or HCOOH) for preparing C₆H₅N(CH₃)₂ from aniline ?

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119.

Sulphanilic acid is insoluble in water and organic solvents. Explain.

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120. Account for the correct order of decreasing basicity of ethylamine, 2-amino ethanol and 3-amino-1-propanol.

The correct order of decreasing basicity is:
CH₃CH₂NH₂ > HO(CH₂)₃NH₂ > HO(CH₂)₂NH₂The electron withdrawing group -OH decreases the electron density on N, lowering its basicity. This effect decreases when the distance from amino group increases.

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