Superhalogen properties of BS2− and BSO−: photoelectron spectroscopy and theoretical calculations

Abstract

We investigate BS₂⁻ and BSO⁻ clusters using photoelectron spectroscopy and theoretical calculations. The electron affinities of BS₂ and BSO are measured to be 3.80 ± 0.03 and 3.88 ± 0.03 eV, respectively, higher than those of halogen atoms. Thus, BS₂ and BSO can be considered as superhalogens. The comparison of experimental and theoretical results confirmed that the ground state structures of BS₂⁻, BSO⁻, and their neutrals are all linear. Analyses of natural bond orbitals suggest that both BS₂⁻ and BSO⁻ have dual 3c-4e π hyperbonds.