A small charge difference that does not change across a bond, with positive and negativepartial charges on the bonded atoms: the result of the bonded atoms having different electronegativities.
Permanent dipole-dipole interactions
Attractive forces between the permanent dipoles in different molecules.
London forces
Attractive forces between Induced dipoles in different molecules: also known as induceddipole-dipole interactions
Dipole
A separation in electrical charge so that one atom of a polar covalent bond, or one end of a polar molecule, has a small positive charge, δ+, and the other has a small negative charge, δ-
Dipole-dipole force
An attractive force between permanent dipoles in neighbouring polar molecules
