| abstract |
The chroman compounds of the formula I according to the invention n R 1 -(A 1 -Z 1 ) a —W 1 —(Z 2 -A 2 ) b -Z 3 —W 2 —(Z 4 -A 3 ) n -R 2 n in which R 1 , A 1 , A 2 , A 3 , W 1 , W 2 , Z 1 , Z 2 , Z 3 , Z 4 , a, b and c have the meanings indicated in claim 1 , have two moieties W 1 and W 2 derived from chroman. The compounds are suitable as components of anisotropic switching media, as used, for example, in liquid-crystal display devices. |