Halogenated benzene derivatives, and a liquid-crystalline medium

US5308541A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Reinhard Hittich · Seeheim-Jugenheim, DE
• Eike Poetsch · Mühltal, DE
• Volker Reiffenrath · Roßdorf, DE
• Bernhard Rieger · Langenau, DE
• Andreas Wachtler · Griesheim, DE
• David Coates · Bishop's Stortford, GB
• Herbert Plach · Darmstadt, DE

Key dates

• Filing date: Nov 15, 1990
• Grant date: May 3, 1994
• Expiry date: Nov 15, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3021
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

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.