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B 18 2− : a quasi-planar bowl member of the Wankel motor family

2014; Royal Society of Chemistry; Volume: 50; Issue: 60 Linguagem: Inglês

10.1039/c4cc02225d

1364-548X

Diego Moreno, Sudip Pan, Lei Liu, Rafael Islas, Edison Osorio, Gerardo Martínez‐Guajardo, Pratim Kumar Chattaraj, Thomas Heine, Gabriel Merino,

Origins and Evolution of Life

A quasi-planar member of the so-called 'Wankel motor' family, B18(2-), is found. This boron cluster is an electronically stable dianion and a concentric doubly σ- and π-aromatic system. The inner B6 unit in B18(2-) undergoes quasi-free rotation inside the perimeter of the B12 ring. The absence of any localized σ-bond between the inner ring and the peripheral boron atoms makes the system fluxional.