Royal Society of Chemistry, Chemical Science, 23(12), p. 8157-8164, 2021
DOI: 10.1039/d1sc00534k
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The global minimum of the B9O− cluster is found to have an umbrella-like structure, where the central B atom exhibits transition-metal-like bonding properties, coordinated by a η7-B7 ligand on one side and a BO ligand on the other.