| abstract |
A novel liquid crystalline carbonate and the mixture containing the same: n n n n n n n n n n wherein R3 is an alkyl (H 2n+1 C n ) or an alkenyl (H 2n−1 C n ) group, each of 1 to 12 carbon atoms, the ring A is laterally unsubstituted benzene or pyridine or pyrimidine or trans-substituted cyclohexane ring, symbol r is 0 to 2; the lateral substituents: X 2 , X 3 , X 4 and X 5 in the benzene rings represent independently hydrogen or fluorine or chlorine atoms, X 1 is hydrogen or fluorine atom and simultaneously at least one of the substituents: X 2 , X 3 and X 4 is fluorine or chlorine atoms, Y is an alkyl or an alkyloxy or an alkenyl or an aikenyloxy group, each of 1 to 12 carbon atoms or hydrogen or fluorine or chlorine atom or NCS group are described. |