Conserved hydrogen-bonded supramolecular synthons in pyridinium tetrachlorometallates

Felloni, M., Hubberstey, P., Wilson, C. and Schroder, M. (2004) Conserved hydrogen-bonded supramolecular synthons in pyridinium tetrachlorometallates. CrystEngComm, 6(19), pp. 87-95. (doi: 10.1039/B401129E)

Abstract

The crystal and molecular structures of the pyridinium tetrahalometallates, [Hpy]2[CoCl4] and [Etpy]2[CoCl4], have been determined and compared with those of other pyridinium tetrahalometallates and 4,4'-bipyridinium perhalometallates. The pyridinium cation in [Hpy]2[CoCl4] uses its heterocyclic N–H and 4-positioned C–H moieties to form bifurcated hydrogen-bonds to tetrahalometallate anions and thus generate organic–inorganic hybrid solids similar in composition to those formed by 4,4-bipyridinium perhalometallate salts. Although the supramolecular synthons based on C–H donors are longer, and by inference, less strong, than those based on N–H donors, they are nonetheless, structure determining. The hydrogen-bonding capability of the ethylpyridinium cation is restricted to C–H donors and hence is not structure determining, the layered hexagonal network structure of [Etpy]2[CoCl4] being dominated by π–π stacking interactions.

• Item Type: Articles
• Additional Information: Acknowledgements: We wish to thank EPSRC for provision of the diffractometer and the University of Nottingham for financial support (to M.F.).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wilson, Dr Claire
• Authors: Felloni, M., Hubberstey, P., Wilson, C., and Schroder, M.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: CrystEngComm
• Publisher: Royal Society of Chemistry
• ISSN: 1466-8033
• Published Online: 25 March 2004