The type of interaction that occurs between molecules that are polar is known as a dipole-dipole interaction. This occurs when the positive end of one polar molecule attracts the negative end of another, leading to an interaction that contributes to the overall properties of substances. For example, water (H₂O), a polar molecule, exhibits strong dipole-dipole interactions, resulting in high boiling and melting points. These interactions play a significant role in determining the physical and chemical properties of polar compounds.