Group 1 Coordination Chains and Hexagonal Networks of Host Cyclotriveratrylene with Halogenated Monocarbaborane Anions
✍ Scribed by Ruksanna Ahmad; Andreas Franken; John D. Kennedy; Michaele J. Hardie
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 303 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0947-6539
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✦ Synopsis
Abstract
Halogenated carbaborane ions [CB~11~H~6~X~6~]^−^ in which X=Cl or Br have been combined with the host molecule cyclotriveratrylene (CTV) and Group 1 metal cations to give crystalline materials. The complexes Na(ctv)(H~2~O)(CB~11~H~6~X~6~) feature chiral Na–CTV coordination chains with complexation of the [CB~11~H~6~X~6~]^−^ ion by the Na^+^ ion, together with the CTV molecular cavity. The coordination chains are hydrogen bonded together to give a puckered two‐dimensional hexagonal grid structure. [K(ctv)(CB~11~H~6~Cl~6~)(CF~3~CH~2~OH)~0.5~] is essentially isostructural. Complexes [Rb(ctv)(CB~11~H~6~Br~6~)(H~2~O)] and [Cs(ctv)(CB~11~H~6~X~6~)(CH~3~CN)] are coordination polymers with related distorted hexagonal grid structures. Use of N,N′‐dimethylformamide (DMF) as a solvent results in an entirely different type of assembly, with [Na~2~(dmf)~4~(H~2~O)~2~(ctv)][(dmf)~0.5~(ctv)][CB~11~H~6~Br~6~]~2~ showing unusual {Na‐μ‐(dmf)‐Na} bridges, and once again forming a distorted hexagonal coordination polymer.