Research Article: Tetra­ethyl­ammonium 12-phenyl­ethynylcarba-closo-dodeca­borate, [Et4N][12-PhCC-closo-CB11H11]

Date Published: May 01, 2009

Publisher: International Union of Crystallography

Author(s): Maik Finze, Guido J. Reiss.


The asymmetric unit of the title compound, C8H20N+·C9H16B11− or [Et4N][12-PhCC-closo-CB11H11], consists of one cation and one anion. The [12-PhCC-closo-CB11H11]− anion is close to possessing a non-crystallographic plane of mirror symmetry with a nearly linear B—C C—C group, with B—C C and C C—C angles of 177.15 (16) and 176.64 (17)°, respectively.

Partial Text

Carba-closo-dodeca­borate anions with functional groups are potential building blocks for a variety of applications, for example ionic liquids and liquid crystals, see: Körbe et al. (2006 ▶). Recently, we have shown that {closo-CB11} clusters with one or two alkynyl groups bonded to boron are accessible by Pd-catalysed Kumada-type cross-coupling reactions starting from the corresponding mono- and diiodinated clusters, see: Finze (2008 ▶, 2009 ▶).




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