Halogen-containing heterocyclic compound and liquid crystal composition
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United States of America Patent
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Aug 23, 1988
Grant Date -
N/A
app pub date -
Jan 14, 1987
filing date -
Jan 21, 1986
priority date (Note) -
Expired
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Abstract
A novel liquid crystalline, halogen-containing heterocyclic compound having a characteristic that even when its S.sub.c * phase is supercooled, no other smectic phases appear, and a liquid crystal composition containing the same are provided, which compound is expressed by the formula ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group of 2 to 18 carbon atoms; X represents --N.dbd. or --CH.dbd.; Y represents F or Cl; n represents an integer of 0 to 10; and a symbol * represents an asymmetric carbon atom.
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