The ubiquitous icosahedral B12 in boron chemistry

Jemmis, E. D. ; Balakrishnarajan, M. M. (1999) The ubiquitous icosahedral B12 in boron chemistry Bulletin of Materials Science, 22 (5). pp. 863-867. ISSN 0250-4707

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Though boranes exhibit a wide variety of polyhedral structures, all the three polymorphs of elemental boron essentially contain icosahedral B12 units as the predominant building block in their unit cell. Theoretical and experimental studies on boranes show that the icosahedral arrangement leads to most stable boranes and borane anions. This paper attempts to explain the phenomenal stability associated with the icosahedral B12 structure. Using fragment molecular orbital theory, the remarkable stability of B12H2-12 amongcloso boranes are explained. The preferential selection icosahedral B12 unit by elemental boron is explained by improvising a contrived B84 sub-unit of the β-rhombohedron, the most stable polymorph. This also leads to a novel covalent way of stuffing fullerenes with icosahedral symmetry.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Boron; Polyhedralcloso Borane Dianions; Icosahedral B12; β-rhombohedral Polymorph; Orbital Compatibility
ID Code:13573
Deposited On:12 Nov 2010 15:19
Last Modified:16 May 2016 22:43

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