Heterocyclic 1,2-difluorobenzene derivatives

Abstract

Abstract Heterocyclic 1,2-difluorobenzene derivatives of the formula I ##STR1## in which R 1 and R 2 , in each case independently of one another, are an alkyl groups (sic) having 1-15 C atoms in which, in addition, one or more CH 2 groups may be replaced by a divalent radical selected from the group comprising --O--, --S--, --CO--, --O--CO--, --CO--O--, --CH═CH-- and --C.tbd.C--, where two heteroatoms are not linked directly to one another, A 1 and A 2 , in each case independently of one another, are a 1,4-phenylene group which is unsubstituted or monosubstituted or polysubstituted by fluorine, and in which, in addition, one or two CH groups may be replaced by N, or are a 1,3,4-thiadiazole-2,5-diyl group or a trans-1,4-cyclohexylene group, m and n are each 0 or 2, o is 0 or 1, and p is 0, 1 or 2, where (o+p) is 1, 2 or 3 and, in the case where p=2, the A 2 groups and n may be identical or different with the proviso that at least one of the groups A 1 and A 2 is a 1,3,4-thiadiazole-2,5-diyl group or an unsubstituted or substituted 1,4-phenylene group in which one or two CH groups have been replaced by N, are suitable as components of liquid-crystalline phases.

Inventors

• 👤 Volker Reiffenrath
• 👤 Joachim Krause
• 👤 Andreas Wachtler
• 👤 Thomas Geelhaar

Bibliographic Details