Journal
LIQUID CRYSTALS
Volume 33, Issue 4, Pages 399-407Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290600633485
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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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