title: Disk aromaticity of the planar and fluxional anionic boron clusters B20(-/2-).
abstract: The presence of excess electrons modifies the structural landscape and tends to extend the planarity of boron clusters. While the neutral B(20) is tubular, both the anion and dianion B(20)(-/2-) become planar. Geometrical features of the stable anions suggest the existence of a new type of cluster that is planar and doubly cyclic with one atom located at the center (see figure), as well as being fluxional.
authors.affiliation: Department of Chemistry, University of Leuven, Celestijnenlaan, 200 F, 3001 Leuven, Belgium.
authors.forename: Truong Ba
authors.initials: TB
authors.lastname: Tai
authors.forename: Arnout
authors.initials: A
authors.lastname: Ceulemans
authors.forename: Minh Tho
authors.initials: MT
authors.lastname: Nguyen