Effect of the character of homo- and heteronuclear chemical bond on the intermolecular interaction energy and properties of halogens and hydrogen halides

The effect of the chemical bond character (the degrees of covalence C _c, metallicity C _m, and ionicity C _i) on the bond rigidity and the components of the van der Waals intermolecular interaction have been shown for halogens and hydrogen halides as an example. The force constant is determined by the chemical bond character. The intermolecular interaction energy of these compounds can be quantified using the C _m and C _i values of the constituent bonds. Thus, the known treatment of intermolecular interaction as residual or secondary to the chemical interaction has been proved to be correct.