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†
Wan-Lu Li,Tian Jian,Xin Chen,Hai-Ru Li,Teng-Teng Chen,Xue-Mei Luo,Si-Dian Li,Jun Li,Lai-Sheng Wang
Abstract
A tubular molecular rotor B2-Ta@B18− (1) and boron drum Ta@B20− (2) with the highest coordination number of twenty in chemistry are observed via a joint photoelectron spectroscopy and first-principles theory investigation.
