What is the experimentally determined sequence of basic strength for strictly gas-phase, unsolvated — Amines Chemistry Question

💡 Solution & Explanation

In the gas phase, solvent effects are completely absent. Basic strength is dictated exclusively by the electron-donating inductive (+I) effect of the alkyl groups. More alkyl groups yield higher basicity, resulting in the $3^\circ > 2^\circ > 1^\circ > NH_3$ order.