发明授权
US5308542A 4,4'-disubstituted 2',3-difluorobisphenyls and a liquid-crystalline medium 失效
4,4'-二取代的2',3-二氟二苯基和液晶介质

4,4'-disubstituted 2',3-difluorobisphenyls and a liquid-crystalline
medium
摘要:
The invention relates to 4,4'-disubstituted 2',3-difluorobiphenyls of the formula I ##STR1## in which n is 1 to 7, A is trans-1,4-cyclohexylene or 1,4-phenylene, r is 0 or 1, X is F, Cl, --CF.sub.3, --CHF.sub.2, --OCF.sub.3 or --OCHF.sub.2 and Z is H or F.
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