Inversely proportional to the third power of the distance between two interacting particles
The energy of dipole-dipole interaction between stationary polar molecules is proportional to 1/ r3, and that between rotating polar molecules is proportional to 1/ r6
where ‘r’ is the distance between polar molecules.
- The attractive force decreases with the increase of distance between the dipoles.
- The interaction energy is inversely proportional to the distance between polar molecules.
- Dipole-dipole interactions occur when the partial charges formed within one molecule are attracted to an opposite partial charge in a nearby molecule.
- Dipole-dipole interaction can be between polar molecules, such as hydrogen chloride (HCl), carboxylic acids (i.e., acetic acid), and amino acids.