Synthesis and Mesomorphic Properties of Tropon-4-yl 4-n-Alkoxybenzoates: Roles of a Tropone Ring as a Polar Terminal Group

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  • KUBO Kanji
    Institute for Materials Chemistry and Engineering, Kyushu University
  • MORI Akira
    Institute for Materials Chemistry and Engineering, Kyushu University
  • UJIIE Seiji
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • TSCHIERSKE Carsten
    Department of Chemistry, Institute of Organic Chemistry, Martin-Luther-University Halle-Wittenberg

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Abstract

New troponoid liquid crystals with a tropone terminal group were prepared. Tropon-4-yl 4-n-alkoxybenzoates (1T) had a monotropic smectic A phase. However the corresponding benzenoid derivatives (1B), tropolon-5-yl 4-n-alkoxybenzoates (2T), 2-methoxytropon-5-yl 4-n-alkoxybenzoates (3T), and tropon-2-yl 4-n-alkoxybenzoates (4T) were not mesomorphic. X-ray diffraction studies revealed that 1T formed the interdigitated bilayers in the smectic A phase.<br>

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