| 摘要 |
PCT No. PCT/EP96/02653 Sec. 371 Date Dec. 31, 1997 Sec. 102(e) Date Dec. 31, 1997 PCT Filed Jun. 19, 1996 PCT Pub. No. WO97/02247 PCT Pub. Date Jan. 23, 1997Fluorinated phenanthrene derivatives of the formula (I) <IMAGE> (I) in which the symbols and indices have the following meanings: E1, E2, E3, E4, E5 and E6 are identical or different and are -N-, -CF- or -CH-; G is -CF2CF2- or -CF=CF-; R1 and R2 are, for example, alkyl or alkoxy; M1, M2, M3 and M4 are, for example, O, -CO-O-, -O-CO- or a single bond; A1 and A2 are, for example, 1,4-phenylene or pyrimidine-2,5-diyl; m and n are zero or one, but in total are not more than one, are suitable as components of liquid-crystalline mixtures.
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