Anisotropic compounds and liquid crystal mixtures

Details Anisotropic compounds and liquid crystal mixtures Anisotropic compounds and liquid crystal mixtures

1986-02-25

1987-08-11

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

25229961, 25229962, 25229963, 544238, 544239, 558388, 558398, 558406, 558410, 558389, 558399, 558409, 558426, 558428, 558429, 558430, 560 1, 560 55, 560 64, 560 66, 560 73, 560105, 560108, 560116, 560 8, 560 59, 560 65, 560 72, 560102, 560107, 560118, 560126, 560138, 560141, 568631, 568632, 568634, 568642, 568659, 568661, 568664, 568665, 570129, 570130, 570182, 570183, 570184, 570185, 570187, 570188, C09K 1030, C07D40312, C07C12146, C07C 1900, C07C 2166, C07C 6976, C07C 43225

Patent

active

046862897

ABSTRACT:
New anisotropic compounds with a cross-polarizing substituent have the formula (1) ##STR1## The increase in .epsilon..perp. is achieved by the polarizing group X, preferably the cyano group or a halogen atom, which is not laterally on the ring, as with the known compounds, but is on the bridge, that is to say is part of the main bridge bonding rings A and B to one another. Ring A has the formula (1a) or (1b) given herein and is always cycloaliphatic, while ring B can be identical to ring A or is an aromatic ring of the formula (1c) or (1d) herein. R.sup.1 and R.sup.2 are identical or different end groups of the formula (1e) herein.
The radical X on the bridge causes less widening of the molecule than a radical X on a ring, which provides comparatively higher clear points and moreover enables aromatic rings to be omitted from the anisotropic compounds.

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