Halogenated diphenyldiacetylene liquid crystals

Details Halogenated diphenyldiacetylene liquid crystals Halogenated diphenyldiacetylene liquid crystals

1993-01-11

1995-10-10

Harris, C.

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

Organic compounds

Sulfur containing

568 66, 568645, 568647, 568661, 556425, 556426, 556465, 570128, 570184, 2522996, C07C31900, C07C 4100, C07C 1700, C09K 1906

Patent

active

054572355

ABSTRACT:
The present invention provides liquid crystals that are diphenyldiacetylenes of the general formulas: ##STR1## where W, X, Y and Z are, independently of one another, a halogen atom, a hydrogen atom or a trihalomethyl group, T.sub.1 and T.sub.2, independently of one another can be an alkyl, alkene, alkoxy, alkenoxy, ether, thioalkyl, thioalkenyl, haloalkyl, haloalkoxy or haloalkylether groups having from three to twenty carbon atoms or a silylalkyl, silylalkenyl, silylalkoxy or silylthioalkyl group having from three to twenty-eight carbon atoms and wherein M.sub.1 and M.sub.2 can both be single bonds or one of M.sub.1 or M.sub.2 can be a trans-1,4-cyclohexylene or a --CH.sub.2 CH.sub.2 -trans-1,4-cyclohexylene.

REFERENCES:
patent: 4431263 (1984-02-01), Garito
patent: 4895975 (1990-01-01), Fujiwara
Reiffenrath, V. et al. (1989) Liquid Crystals 5: 159-170.
Chemical Abstracts 114(10) 82718z, 1991.
Chemical Abstract 101(4) 24111s, 1984.
Abstract of oral presentation of Michael Wand at the Fourteenth International Liquid Crystal Conference in Jun. 1992 at Pisa, Italy. It is believed that the abstract was made available to attendees of the meeting in Jun. 1992.

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