The common trends for the halogen, chalcogen, and pnictogen bonds via sorting principles and local bonding properties

Abstract

We disclose the common trends for relationships between the binding energy and the local electronic properties at the bond critical points of electron density for the halogen, chalcogen, and pnictogen bonds in molecular complexes. Variations in the sorting principles for noncovalent bonds in which the electrophilic site delivered by the P, As, S, Se, Cl, Br atoms are studied. Electronic kinetic and potential energy densities give regularly changing parameters in the single-factor models «binding energy versus local electronic property» only if a sort of electrophilic site provider is fixed. In contrast, the electrostatic potential and the potential acting on an electron in a molecule lead to the common trends only if the nucleophilic molecule is fixed. The behavior of parameters in the single-factor models was also studied under the different sorting principles of noncovalent bonds in samples.