Halogenated benzene derivatives, and a liquid-crystalline...

C - Chemistry – Metallurgy – 07 – C

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51/105, 260/653.

C07C 25/18 (2006.01) C07C 22/08 (2006.01) C07C 43/225 (2006.01) C07C 255/50 (2006.01) C09K 19/30 (2006.01)

Patent

CA 2039721

- 59 - Abstract The invention relates to novel halogenated benzene derivatives of the formula I Image I 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, -CHF2, -CF3, -CN, -OCF3 or -OCHF2, 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 = -CHF2, -CF3, -OCF3 or -OCHF2, r is alternatively O, and s = 1 or, in the case where B = 1,4- phenylene or 3-fluoro-1,4-phenylene, s = 0.

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