Abstract
Molecular parameters of hexaalkoxytriphenylenes with different substituents on the periphery of the triphenylene nucleus of known and hypothetical structures are calculated. The probability of a discophase for compounds of this series is estimated from molecular parameters. Several compounds of this series having polar groups (NO2, NH2) in the 1 position of the triphenylene nucleus have been synthesized. The compounds synthesized were investigated by thermopolarizing microscopy and X-ray diffraction analysis. The data on the mesomorphism of the new compounds are in good agreement with our prediction that alkoxytriphenylenes with polar groups have a discophase. It is established that introduction of an electron-accepting group at position 1 of the triphenylene nucleus expands the temperature range of existence of the discophase to room temperature. On the contrary, introduction of an electron-donating group narrows this interval. Compounds of this series presumably have a hexagonal columnar structure.
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Additional information
Ivanovo State University. Warsaw University. Translated fromZhurnal Strukturnoi Khimii, Vol. 39, No. 3, pp. 464–472, May–June, 1998.
This work was supported by RFFR grant No. 96-02-19036.
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Akopova, O.B., Bronnikova, A.A., Kruvchinskii, A. et al. Polysubstituted triphenylenes with active groups. Molecular parameters, synthesis, structure, and mesomorphism. J Struct Chem 39, 376–383 (1998). https://doi.org/10.1007/BF02873645
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DOI: https://doi.org/10.1007/BF02873645