Halogenated benzene derivatives, and a liquid-crystalline medium

摘要

The invention relates to novel halogenated benzene derivatives of the formula I ##STR1## in which n is 1 to 7 [sic], the rings A and B are each trans-1,4-cyclohexylene, or one of the rings A and B is alternatively 1,4- phenylene or 3-fluoro-1,4-phenylene, X is F, Cl, --CHF. sub.2, --CF.sub.3, --CN, --OCF.sub.3 or --OCHF.sub.2, Y and Z are each, independently of one another, H or F, r=1 or, in the case where s=1, B=trans-1,4-cyclohexylene and simultaneously X=CHF.sub.2, --CF.sub.3, -- OCF.sub.3 or --OCHF.sub.2, r is alternatively 0, and s=1 or, in the case where B=1,4-phenylene or 3- fluoro-1,4-phenylene, s=0.