| abstract |
A compound of formula (I)n nwherein R is an organic residue.n nis an unsubstituted or substituted silicon-containingncyclohexylene group or a 1,4-cyclohexylenengroup,n nis an unsubstituted or substituted phenylene, annunsubstituted or substituted silicon-containingncyclohexylene group or trans-4-sila-1,4-cyclohexylenengroup, or a 1,4-cyclohexylene group provided that at leastnone of the ring structures A and B represents a silicon-containingncyclohexylene group, m , n , j, k and l are each Hnor F, m and n are each 0 or 1, X 1 and Y are each H, F ornCl, and X 2 is F or Cl, a liquid crystal compositionncomprising the compound and a liquid crystal devicencomprising the composition are described. |