| abstract |
Fluoro tolans of formula (I), wherein R1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH¿2? groups may also be replaced by -O-, -O-CO-, -CO-O- and/or -CH=CH-, A is trans-1,4-cycolhexylene or 1,4-phenylene, r is 0 or 1, s is 0 or 1, Q is -CF2- or -OCF2- and - if Y = F and/or L?1 = L2¿ = F - also a single bond, L?1 and L2¿ are H or F, and Y is H, F or Cl are suitable as components of liquid crystalline media. |