Liquid Crystal Materials with Sulfur Atoms Incorporated in the Principal Structure. VI. Optically Active New Smectic Liquid Crystal Compounds with 1,3-Oxathiane or 1,3-Dithiane Ring
作者:Yuichiro Haramoto、Yoko Tomita、Hiroyoshi Kamogawa
DOI:10.1246/bcsj.59.3877
日期:1986.12
(+)-2-Methylbutyl p-(5-alkyl-1,3-oxathian-2-yl)benzoate and -cinnamate (7) were synthesized. The mesomorphic behavior of these compounds were measured. Though (+)-2-methylbutyl p-(5-alkyl-1,3-oxathian-2-yl)benzoate did not exhibit any liquid-crystal phase, the corresponding 1,3-dithiane compounds (8-1, 8-2, and 8-3) and compound (7-4) having R’ of a normal alkyl chain exhibited a smectic phase. This
(+)-2-甲基丁基对-(5-烷基-1,3-氧杂-2-基)苯甲酸酯和-肉桂酸酯(7)被合成。测量了这些化合物的介晶行为。尽管 (+)-2-甲基丁基对-(5-烷基-1,3-氧杂-2-基)苯甲酸酯没有显示任何液晶相,但相应的 1,3-二噻烷化合物 (8-1, 8-图2和8-3)和具有正烷基链的R'的化合物(7-4)表现出近晶相。这必须源于化合物 7-1、7-2 和 7-3 的更宽的分子宽度。尽管化合物 7 和 8 的肉桂酸酯表现出对映行为,但相应的苯甲酸酯却没有。这必须源于共轭系统长度和分子长度的增加。