What is the difference between Keesom interactions and, London dispersion forces?

1 Answer
Ernest Z.
Dec 2, 2016

Keesom interactions are dipole-dipole interactions, while London dispersion forces are induced dipole-induced dipole interactions.

Explanation:

Both types of interaction contribute to van der Waals forces.

Keesom interactions

Keesom interactions are the electrostatic interactions among the permanent dipoles of polar molecules.

They arise when the #δ^"+"# end of a dipole in one molecule is attracted to the #δ^"-"# end of a dipole in another molecule.

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London dispersion interactions

London dispersion interactions arise when a temporary imbalance of electrons of a nonpolar molecule induce a temporary dipole in another nearby molecule.

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