Intramolecular hydrogen bonding: Occurs within a single molecule, where a hydrogen atom is shared between two electronegative atoms.
Intermolecular hydrogen bonding: Forms between different molecules, where a hydrogen atom of one molecule is attracted to an electronegative atom of another molecule.
Dipole-dipole hydrogen bonding: Involves the interaction between the positive end of one polar molecule and the negative end of another polar molecule through hydrogen bonding.
