| Autor: |
Kayako Hori, Yasuko Matsunaga, Atsushi Yoshizawa, Tetsuo Kusumoto, Tomoji Ozeki, Akifumi Iida, Hirokazu Chiba |
| Jazyk: |
angličtina |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Liq. Cryst.. 31(No. 6):759-766 |
| ISSN: |
0267-8292 |
| Popis: |
Various different crystal structures were found for four mesogenic diphenylpyrimidines with two chiral centres and these have been compared with the previously determined crystal structure of 2-{4-[(R)-2-fluorohexyloxy]phenyl}-5-{4-[(S)-2-fluoro-2-methyldecanoyloxy]phenyl}pyrimidine (1) which shows an isotropic mesophase. 2-{4-[(S)-2-Fluoro-2-methyldecanoyloxy]phenyl}-5-{4-[(R)-2-fluorohexyloxy]phenyl}pyrimidine (2) and 2-{4-[(R)-2-fluorohexyloxy]biphenyl-4′-yl}-5-[(S)-2-fluoro-2-methyldecanoyloxy]pyrimidine (3), which are isomers of 1 with different N positions, have a structure comprising L-shaped molecules with the chains associated between layers (MHPOBC-type) and a polar structure of stacked monolayers of parallel molecules, respectively. Two diastereomers, 2-{4-[(R)-2-fluorohexyloxy]phenyl}-5-{4-[(R)-2-butyloxypropanoyloxy]phenyl}pyrimidine (4) and 2-{4-[(S)-2-fluorohexyloxy]phenyl}-5-{4-[(R)-2-butyloxypropanoyloxy]phenyl}pyrimidine (5) with the same core as 1 but a different chain, have similar str... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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