abstract |
Anisotropic compounds having a nematic phase have the formula ##STR1## wherein A is a cyclic radical selected from the group consisting of ##STR2## Z is selected from the group consisting of a single bond, a --CH2CH2-- group, n n is 1 or 2, n R 1 and R 2 are selected from the group consisting of C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy. |