Benzol derivatives and liquid crystalline medium

摘要

Benzene derivatives of the formula I in which n is 1 to 7, Q is -CO or -(CH2)r- where r is 1 to 5, s is 0, 1 or 2, t is 0 or 1, where s+t>/=1, X is F, Cl, -CF3, -CN, -OCF3 or -OCHF2, and Y, L and Z are each, independently of one another, H or F.