Hydrogen bonding is observed when \(H\) atom is attached to more electronegative \(N, F\) or \(O\) atom.

Thus, hydrogen bonding is possible in ethanol and triethylamine.

In ethanol, \(H\) is attached to a more electronegative oxygen than in

triethylamine, in which \(H\) is attached to a less electronegative nitrogen.

Moreover, in triethyl amine, the \(+ I\) effect of three methyl groups decreases the extent of hydrogen bonding.