Solar-Encinas J, Leyva-Parra L, Yáñez O, Inostroza D, Barrios-Llacuachaqui JR, Vásquez-Espinal A, Orellana W, Tiznado W. Bowl-shaped CuB12- Cluster. A viable Global Minimum with Twofold Aromaticity.
Chemphyschem 2022;
23:e202200366. [PMID:
35785508 DOI:
10.1002/cphc.202200366]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/28/2022] [Indexed: 11/05/2022]
Abstract
A low-lying structure is revealed for the CuB 12 - cluster, which is bowl-shaped. It consists of a triangular CuB 2 base and a B 10 rim. Molecular dynamics simulations evidence its structural robustness; at an elevated temperature (600 K), the base rotates reversibly within the B 10 perimeter. Chemical bonding analysis detects 2σ- and 3π-delocalized bonds, suggesting double aromaticity, which is confirmed by two diatropic and concentric ring currents under an external magnetic field.
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