are stronger intermolecular forces
than Dispersion forces
occur between molecules that have
permanent net dipoles (polar molecules), for
example, dipole-dipole interactions occur between
SCl2 molecules, PCl3 molecules
and CH3Cl molecules. If the permanent net
dipole within the polar molecules results from a
covalent bond between a hydrogen atom and either
fluorine, oxygen or nitrogen, the resulting
intermolecular force is referred to as
Hydrogen
Bonding.
The partial positive charge on one
molecule is electrostatically attracted to the
partial negative charge on a neighboring molecule.