Contrast the order of basicity of aliphatic amines based on stability of substituted ammonium cations with the order predicted by the inductive effect.

The order of basicity based on stability of substituted ammonium cations is opposite to the order predicted by the inductive effect. In terms of cation stability, tertiary amines are more stable than secondary, and secondary more than primary. This suggests that the basicity order should be tertiary > secondary > primary. However, according to the inductive effect, which considers electron-donating ability, the basicity order is primary > secondary > tertiary. The inductive effect prevails in determining basicity, as it emphasizes the influence of alkyl groups on the lone pair availability, outweighing the stabilizing effect on the ammonium cation.