(a) Give plausible explanation for each of the following : (i) The presence of a base is needed in the ammonolysis of alkyl halides. (ii) Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis. (b) Write the IUPAC name of ""CH_(3)-underset(overset(|)(C_(2))H_(5)overset(||)(O))(N-C)-CH_(3)

(a) Give plausible explanation for each of the following : (i) The pr

1.	(a) Give plausible explanation for each of the following : (i) The presence of a base is needed in the ammonolysis of alkyl halides. (ii) Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis. (b) Write the IUPAC name of ""CH_(3)-underset(overset(\|)(C_(2))H_(5)overset(\|\|)(O))(N-C)-CH_(3)
Answer» SOLUTION :(i) An alkyl halide reacts with ammonia to FORM primary amine. Primary amine formed reacts further with alkyl halide to form secondary and TERTIARY amines. Presence of a base (B) in this reaction increases the rate of reaction. `""B +:NH_(3) rarr B-H+NH_(2)^(-)` `""R-X+NH_(2)^(-) rarr R-NH_(2)+X^(-)`. (b) `""CH_(3)-UNDERSET(overset(\|)(C_(2))H_(5)overset(\|\|)(O))(N-C)-CH_(3)`