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Liquid Crystals Volume 3, 1988 - Issue 12
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Original Articles

The Synthesis and Liquid Crystal Properties of Some 2,5-Disubstituted Pyridines

Michael P. Burrow School of Chemistry, University of Hull, Hull, HU6 7RX, England
,
George W. Gray School of Chemistry, University of Hull, Hull, HU6 7RX, England
,
David Lacey School of Chemistry, University of Hull, Hull, HU6 7RX, England
&
Kenneth J. Toyne School of Chemistry, University of Hull, Hull, HU6 7RX, England
Pages 1643-1653 | Received 18 Apr 1988, Accepted 04 Jul 1988, Published online: 25 Sep 2007
 
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Abstract

The synthesis is reported of fifteen three-ring 2,5-disubstituted pyridines and two pyridine-N-oxides where the pyridine rings carry a variety of alkyl, aryl, cyclohexyl, cyclohexylethyl and fluorinated-aryl substituents. The mesomorphic transition temperatures for these compounds have been measured; all the compounds show enantiotropic phases. The different substituent effects are discussed and comparisons are made with previous work on analogous systems where the hetero-function is replaced by C-F.

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