Silacyclohexane compounds, preparation thereof liquid crystal compositions comprising the same, and liquid crystal devices comprising the composition

摘要

A silacyclohexane compound of the formulas (I) <IMAGE> (I) <IMAGE> wherein R represents an organic residue, <IMAGE> represents an unsubstituted or substituted silicon-containing cyclohexylene group or a 1,4-cyclohexylene group, <IMAGE>ylene, an unsubstituted or substituted silicon-containing cyclohexylene group or trans-4-sila-1,4-cyclohexylene group, or a 1,4-cyclohexylene group provided that at least one of these residues represents a silicon-containing cyclohexylene group, m, n, i, k and l are, respectively, 0 or 1 provided that j+l=0 or 1 and m+k=1 or 2, L1 and L2, respectively, represent H or F, m and n are, respectively, 0 or 1, X1 and Y independently represent H, F or Cl, and X2 represents F or Cl. A liquid crystal composition comprising the silacyclohexane compound of the above formula is also described, along with a liquid crystal device comprising the composition.