Observation of a metal-centered B2-Ta@B18− tubular molecular rotor and a perfect Ta@B20− boron drum with the record coordination number of twenty

Abstract

A B ₂-Ta@B ₁₈ ⁻ tubular molecular rotor and a Ta@B ₂₀ ⁻ boron drum with the record coordination number of twenty were observed via a joint experimental and theoretical investigation.

Abstract

A tubular molecular rotor B ₂-Ta@B ₁₈ ⁻ ( 1) and boron drum Ta@B ₂₀ ⁻ ( 2) with the highest coordination number of twenty in chemistry are observed via a joint photoelectron spectroscopy and first-principles theory investigation.