Dipole-dipole interactions are the major intermolecular force in a sample of liquid acetone.
London dispersion and dipole-dipole forces are both present in acetone.
The positive end of one polar molecule and the negative end of another polar molecule are attracted to one another by dipole-dipole forces. Strengths of dipole-dipole forces per mole range from 5 kJ to 20 kJ.
Dipole-dipole interactions are hence forces between molecules. A dipole moment can be found in any polar molecule. Hydrogen chloride (HCl) is a good example of a dipole-dipole interaction because the comparatively positive end of a polar molecule attracts the relatively negative end of another HCl molecule.
For instance, the strongest intermolecular force or strongest dipole dipole force is thought to be the H-F, H-N, or H-O bonding.
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