LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION CONTAINING THE LIQUID CRYSTAL COMPOUND AND LIQUID CRYSTAL DISPLAY ELEMENT PRODUCED BY USING THE LIQUID CRYSTAL COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a liquid crystal compound having low viscosity, negative dielectric anisotropy and excellent optical anisotropy, voltage-retention, stability and compatibility and useful for liquid crystal display element, etc., by introducing a specific group into a skeleton structure. ;SOLUTION: The compound has a group of C(CF₃)₂G and/or GC(CF₃)₂ [G is O, a (1-10C alkyl-substituted)imino, etc.] in the skeleton structure and is expressed by the formula [R¹ and Y¹ are each a 1-20C alkyl, H, a halogen cyano, etc.; X¹ to X⁴ are each (CH₂)₂, CH=CH, CC, COO, C(CF₃)₂G, etc.; the rings A¹ to A⁵ are each trans-cyclohexane-1,4-diyl, cyclohex-1-ene-1,4-diyl, 1,4-phenylene, etc.; a¹ to a⁵ are each 0 or 1; a¹+a²+a³+a⁴+a⁵1].;COPYRIGHT: (C)1998,JPO