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Several 3 .11-disubstituted dispiro[5.1.5.1]tetradecane-7,14-dions were prepared and the cis/trans-isomers were separated. The trans -stereoisomers were converted into the gem-dihalide ketones and mono- and dithioketones. The phase transfer temperatures were determined. Liquid crystal phases were observed.

zeitschrift für naturforschung b

Das Dispiro[5.1.5.1]tetradecan-Gerüst als Baustein für thermotrope Flüssigkristalle / Thermotropic Liquid Crystals Containing the Dispiro[5.1.5.1]tetradecane Unit