(i) Write IUPAC name of $C H_{3} C H_{2} N H_{2}$ .
(ii) Arrange the following amines in the order of their increasing basic strength in aqueous solution.
$(C H_{3})_{3} N_{1} (C H_{3})_{2} N H_{1} C H_{3} N H_{2}$ .

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Solution

(i) The IUPAC name of $C H_{3} C H_{2} N H_{2}$ is ethanamine. Its common name is ethylamine. In IUPAC system, alkyl amines are named as alkanamine.

(ii) The order of their increasing basic strength in aqueous solution is $(C H_{3})_{3} N < C H_{3} N H_{2} < (C H_{3})_{2} N H$ .
This is due to a combination of inductive effect, solvation effect, and steric effect.

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