basicity of amines

Question

Gas phase basicity order (strongest base first) is typically:

RankGuru · Accepted Answer

1. **Basicity Basis**: In the gas phase, the basicity of amines is determined purely by the **electron density** on the Nitrogen atom.
2. **Inductive Effect (+I)**: Alkyl groups (like methyl, $-CH_3$) donate electron density to the Nitrogen atom through the $+I$ effect.
3. **Scaling**: The more alkyl groups attached, the higher the electron density and the easier it is for the Nitrogen to donate its lone pair.
4. **Order**: Tertiary ($(CH_3)_3N$) > Secondary ($(CH_3)_2NH$) > Primary ($CH_3NH_2$) > Ammonia ($NH_3$).
5. **Note**: In **aqueous solution**, the order changes due to solvation and steric effects ($e.g.,$ Secondary > Primary > Tertiary for methyl amines).

Rank Guru

basicity of amines

Select the correct option:

More basicity of amines Practice Questions

Correct decreasing basicity order in aqueous solution: