Accountfor the following:(i) pKbof aniline is more than thatof methyla

1.	Accountfor the following:(i) pKbof aniline is more than thatof methylamine.(ii) Ethylamine is soluble in waterwhereas aniline is not.(iii) Methylaminein water reacts with ferric chloride to precipitate hydrated ferricoxide.(iv) Althoughamino group is o,p− directingin aromatic electrophilic substitution reactions, aniline onnitration gives a substantial amount of m-nitroaniline.(v) Aniline does not undergoFriedel-Crafts reaction.(vi) Diazoniumsalts of aromatic amines are more stable than those of aliphaticamines.(vii) Gabriel phthalimide synthesis ispreferred for synthesising primary amines.
Answer» Account for the following: (i) pK_bof aniline is more than that of methylamine. (ii) Ethylamine is soluble in water whereas aniline is not. (iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide. (iv) Although amino group is o, p− directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline. (v) Aniline does not undergo Friedel-Crafts reaction. (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines.

Accountfor the following:(i) pKbof aniline is more than thatof methylamine.(ii) Ethylamine is soluble in waterwhereas aniline is not.(iii) Methylaminein water reacts with ferric chloride to precipitate hydrated ferricoxide.(iv) Althoughamino group is o,p− directingin aromatic electrophilic substitution reactions, aniline onnitration gives a substantial amount of m-nitroaniline.(v) Aniline does not undergoFriedel-Crafts reaction.(vi) Diazoniumsalts of aromatic amines are more stable than those of aliphaticamines.(vii) Gabriel phthalimide synthesis ispreferred for synthesising primary amines.

Answer»

Account
for the following:

(i)
pK_bof aniline is more than that
of methylamine.

(ii)
Ethylamine is soluble in water
whereas aniline is not.

(iii) Methylamine
in water reacts with ferric chloride to precipitate hydrated ferric
oxide.

(iv) Although
amino group is o,
p− directing
in aromatic electrophilic substitution reactions, aniline on
nitration gives a substantial amount of m-nitroaniline.

(v)
Aniline does not undergo
Friedel-Crafts reaction.

(vi) Diazonium
salts of aromatic amines are more stable than those of aliphatic
amines.

(vii)
Gabriel phthalimide synthesis is
preferred for synthesising primary amines.

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