| 摘要 |
Chiral smectic compounds having a high response rate and being superior as a ferroelectric liquid crystalline material, and chiral smectic mixtures containing the same are provided, which compounds being expressed by the formula <IMAGE> (I) wherein X represents -CH2-, -O- or -CO-; n represents 0, 1 or 2; when X represents -CH2-, Y represents R-, R-CO-, ROCO-, <IMAGE> wherein R represents an alkyl group having 1 to 18 carbon atoms, and when X represents -O- or -CO-, Y represents R; and * represents a symbol indicating an optically active carbon atom.
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