Claims
- 1. A compound containing a molecular structural element with two chirality centers and at least one mesogenic molecular structural element, which compound is defined by the formula (I) ##STR22## wherein: Y.sup.1 is H, (C.sub.1 -C.sub.10)alkyl, MC--CH.sub.2 or MC--CO, MC being a mesogenic radical of the formula (II)
- R.sup.4 --(A.sup.1 --).sub.n1 (B--).sub.n2 (A.sup.2 --).sub.n3(II)
- wherein:
- R.sup.4 is a straight-chain or branched (C.sub.1 -C.sub.12)alkyl group, in which one CH.sub.2 group of the alkyl group can be replaced by an O atom, or if n1 is 1, R.sup.4 also can be F, Cl, Br or CN,
- A.sup.1, A.sup.2 are, independently of each other, 1,4-phenylene or 1,4-cyclohexylene,
- B is CO--O or O--CO,
- n1, n2, n3 are, independently of each other, 0, 1 or 2, n1 and n3 not being 0 at the same time, and n1 and n3 not being 2 at the same time,
- Y.sup.2 is (C.sub.1 -C.sub.10)alkyl, MC--CH.sub.2 or MC--CO, or Y.sup.1 and Y.sup.2 together represent the group MC--CH, which is then part of a dioxolane ring,
- X is COOR.sup.1, CONH.sup.2, CONR.sup.2 R.sup.3 or C.tbd.N,
- R.sup.1 is (C.sub.1 -C.sub.10)alkyl or MC--CH2 and
- one of R.sup.2 and R.sup.3 is H and the other is (C.sub.1 -C.sub.4)alkyl or, independently of each other, both R.sup.2 and R.sup.3 are (C.sub.1 -C.sub.4)alkyl.
- 2. A twistable liquid crystal phase containing 0.01 to 70% by weight of at least one of the chiral compounds of the formula (I) as claimed in claim 1.
- 3. A liquid crystal display element containing a liquid crystal phase as claimed in claim 2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3604898 |
Feb 1986 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/014,290, filed Feb. 13, 1987 now abandoned.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
4264148 |
Gobl-Wunsch et al. |
Apr 1981 |
|
4584120 |
Fujii et al. |
Apr 1986 |
|
4650600 |
Heppke et al. |
Mar 1987 |
|
4673529 |
Sugimori et al. |
Jun 1987 |
|
4686289 |
Huynh-Ba et al. |
Aug 1987 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0168043 |
Jan 1986 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
14290 |
Feb 1987 |
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