Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Liquid Crystal Materials with Sulfur Atoms Incorporated in the Principal Structure. IV. New Liquid Crystal Compounds; 2-(p-Substituted phenyl)-5-alkyl-1,3-oxathianes
Yuichiro HaramotoHiroyoshi Kamogawa
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1985 Volume 58 Issue 6 Pages 1821-1824

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Abstract

2-(p-Substituted phenyl)-5-alkyl-1,3-oxathianes, new liquid crystal compounds, were synthesized by the acetalformation reaction of the corresponding aldehydes and 2-alkyl-3-mercapto-1-propanols. The mesomorphic behaviors of these 1,3-oxathiane compounds were compared with those of the corresponding 1,3-dithianes and 1,3-dioxanes. Some of 2-(p-cyanophenyl)-5-alkyl-1,3-oxathianes exhibit monotropic nematic liquid crystal phase at room temperature, whereas 2-(p-alkoxyphenyl)-5-alkyl-1,3-oxathianes tend hardly to exhibit liquid-crystal phase. These mesomorphic characters seem to originate in the molecular width and bending at the 1,3-oxathiane ring.

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