Question

What are intermolecular forces of attraction involved in molecular crystals?

Answer 1

1. Weak dipole-dipole interactions in polar molecules such as solid HCl, H₂ O, SO₂ , which possess permanent dipole moment.
2. Very weak dispersion or London forces in nonpolar molecules such as solid CH₄ , H₂, These forces are also involved in monoatomic solids like argon, neon.
3. Intermolecular hydrogen bonds in solids such as H₂O (ice), NH₃, HF and so forth.