Give plausible explanation for each of the following: (i) Why are amines less acidic than alcohols of comparable molecular masses? (ii) why do primary amines have higher boiling point than than tetiary amines? (iii) Why are aliphatic amines stronger bases than aromatic amines?

Give plausible explanation for each of the following: (i) Why are ami

1.	Give plausible explanation for each of the following: (i) Why are amines less acidic than alcohols of comparable molecular masses? (ii) why do primary amines have higher boiling point than than tetiary amines? (iii) Why are aliphatic amines stronger bases than aromatic amines?
Answer» Solution :(i) It is because `C_(2)H_(5)O^(ϴ)` is more stable than `C_(2)H_(5)NH^(ϴ)` because oxygen is more electronegative than nitrogen. (ii) Due to the presence of two H-atioms on N-atom of primary amines, they undergo extensive intermolecular H-bonding while tertiary amines due to the absence of a H-atoms on the N-atom do not undergo H-bonding. As result, primary amines have higher boiling pont tan tertiary amines of camparable molecular MASSES. (iii) It is because there is electron withdrawing `C_(6)H_(5)` GROUP in aromatic amines which makes them less basic than aliphatic amines in whcih ALKYL group is electron releasing.