NEW LIQUID-CRYSTAL COMPOUNDS (+)-4-[5-(2-METHYLBUTYL)-1,3-DIOXAN-2-YL]PHENYL 4-ALKOXYBENZOATE

被引:17
作者
HARAMOTO, Y
HINATA, T
KAMOGAWA, H
机构
[1] Department of Applied Chemistry, Yamanashi University, Kofu, 400
关键词
D O I
10.1080/02678299208028993
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
New liquid crystal compounds, (+)-4-[5-(2-methylbutyl)-1,3-dioxan-2-yl] phenyl 4-alkoxybenzoates (5), were synthesized. The mesomorphic behaviour of these compounds is compared with that of (+)-4-(5-alkyl-1,3-dioxan-2-yl)-phenyl 4-(2-methylbutoxy)benzoates (6). While compounds 6 exhibited a chiral smectic C phase, the corresponding compounds 5 did not. This might mean that for the appearance of a chiral smectic C phase in these types of compounds, it is necessary that the carbonyl and the chiral groups exist at nearby positions. Transition temperatures to those isotropic state for compounds 5 were lower than those for compounds 6. This result is common in both cases of (+)-4-alkoxycarbonylphenyl-4-[5-(2-methylbutyl)-1,3-dioxan-2-yl]benzoates (7), and (+)-4-(2-methylbutoxycarbonyl)phenyl 4-(5-alkyl-1,3-dioxan-2-yl)-benzoates (8).
引用
收藏
页码:335 / 340
页数:6
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