Mesomorphism of complexed 2,6-disubstituted pyridine ligands: crystal and molecular structure of two bent-core pyridines |
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| Authors: | Mari Carmen Torralba Deborah M Huck H Loc Nguyen Peter N Horton Bertrand Donnio Michael B Hursthouse Duncan W Bruce |
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| Institution: |
a Department of Chemistry, University of Exeter, Exeter EX4 4QD, UK
b IPC MS, UMR 7504 (CNRS-ULP), GMO, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
c EPSRC Crystallographic Service, Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK
d Department of Chemistry, University of York, Heslington, YORK YO10 5DD, UK |
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| Abstract: | Bent-core, polycatenar pyridines are reported, synthesized via a Siegrist coupling of di- and tri-alkoxybenzylidene fragments with 2,6-dimethylpyridine. None of these pyridines was liquid crystalline. Isomeric materials based on a 3,5-disubstituted pyridine core were mesomorphic in hydrogen-bonded complexes, whereas these new materials were not. However, the new pyridines did form mesomorphic metal complexes with silver salts. Some insight into this behaviour is gleaned from single crystal structure determinations of the model systems, 3,5-bis(3',4'-dimethoxystyryl)pyridine and 2,6-bis(3',4'-dimethoxystyryl)pyridine. |
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