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Ques no. 7 : When C2H5Br is
treated with excess of alcoholic
NH3, the major product obtained
is
PS
to
е
ga
d
va
the
W!
ethyl amine
end
diethyl amine
to
(su
triethyl amine
tetraethyl ammonium bromide
the
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Answers
CHEMISTRY
When excess of ethyl iodide is treated with ammonia, the product is:
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ANSWER
The order of reactivity of halides with amines is RI>RBr>RCl.
When an excess of ethyl iodide is treated with ammonia, the product formed is tetraethylammonium iodide.
NH
3
+C
2
H
5
I(excess)→C
8
H
20
N
+
Tetra ammonium iodide is a quaternary salt produced from the ammonolysis of an alkyl halide with ammonia as the nucleophile.
An alkyl or benzyl halide on reaction with an ethanolic solution of ammonia undergoes nucleophilic substitution reaction in which the halogen atom is replaced by an amino (–NH
2
) group. The primary amine thus obtained behaves as a nucleophile and can further react with an alkyl halide to form secondary and tertiary amines and finally quaternary ammonium salt.