Beryllium bonding with noble gas atoms.

Quantum chemical calculations were carried out to investigate the nature of the bonding between a neutral Be ring and noble gas atom. Electronic structure calculation for these complexes was carried out at different computational levels in association with natural bond orbital, quantum theory of atoms in molecules, electron localization function, symmetry adapted perturbation theory, and molecular electrostatic potential surface analysis of Be complexes. The Be atoms in the Be moiety are chemically bonded to one another, with the BeBe bond dissociation energy being 125 kJ mol . The Be ring interacts with the noble gases through non-covalent interactions. The binding energies of the noble gas atoms with the Be ring increases with increase in their atomic number. The non-covalent interaction index, density overlap region indicator and independent gradient model analyses reveal the presence of non-covalent inter-fragment interactions in the complexes. Energy decomposition analysis reveals that dispersion plays the major role towards stabilizing these systems.