Perhydrophenanthrene derivatives, their preparation, and their u

Details Perhydrophenanthrene derivatives, their preparation, and their u Perhydrophenanthrene derivatives, their preparation, and their u

1982-12-08

1984-02-28

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229963, 260465C, 350350R, 560 1, 570187, 570188, 568665, 585 21, C09K 334, G02F 113, C07C 1360, C07C 2344, C07C 4318, C07C 69013, C07C12146

Patent

active

044340737

ABSTRACT:
Perhydrophenanthrene derivatives of formula I ##STR1## wherein R.sub.1 is alkyl of 1-10 C atoms and R.sub.2 is alkyl, alkoxy or alkanoyloxy each of 1-10 C atoms, H, Br, Cl or CN, have an extremely low optical anisotropy and are particularly suitable as components of liquid-crystalline dielectrics.

REFERENCES:
patent: 3755361 (1973-08-01), Shaw et al.
patent: 3947375 (1976-03-01), Gray et al.
patent: 3984419 (1976-10-01), Hauck et al.
patent: 4095029 (1978-06-01), Fields
patent: 4113726 (1978-09-01), Hauck et al.
patent: 4130502 (1978-12-01), Eidenschink et al.
patent: 4154697 (1979-05-01), Eidenschink et al.
patent: 4324644 (1982-04-01), Dura-Swamy
patent: 4386007 (1983-05-01), Krause et al.
Demus, D., et al., Fl/u/ ssige Kristalle in Tabellen, pp. 244-247 (1974).
Praefcke, K., et al., Chem. Zeitung, vol. 104, No. 9, pp. 269-271 (1980).

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