Question

Write increasing order of basic strength of following: (i) (1)R-NH, (2) Ph–NH2 (3) R-C-NH2 O​

Answer 1

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3 and 3°>2°>1°→ basic strength in a gaseous phase.

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3 and 3°>2°>1°→ basic strength in a gaseous phase. Thus, the increasing order of basic strength from the options can be

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3 and 3°>2°>1°→ basic strength in a gaseous phase. Thus, the increasing order of basic strength from the options can beIV<III<II>I

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3 and 3°>2°>1°→ basic strength in a gaseous phase. Thus, the increasing order of basic strength from the options can beIV<III<II>III,III,IV are secondary amines. III is aromatic, hence is less basic than II,IV. The lone pair of amine resonates with the −CHO bond, hence it cannot be freely available, thus it is less basic.

Aliphatic amines are stronger bases than ammonia and aromatic amines are weaker bases than NH 3 and 3°>2°>1°→ basic strength in a gaseous phase. Thus, the increasing order of basic strength from the options can beIV<III<II>III,III,IV are secondary amines. III is aromatic, hence is less basic than II,IV. The lone pair of amine resonates with the −CHO bond, hence it cannot be freely available, thus it is less basic.Option C is correct.