| abstract |
PCT No. PCT/GB89/00178 Sec. 371 Date Aug. 30, 1990 Sec. 102(e) Date Aug. 30, 1990 PCT Filed Feb. 21, 1989 PCT Pub. No. WO89/08102 PCT Pub. Date Sep. 8, 1989.Laterally fluorinated 4-cyanophenyl and 4'-cyanobiphenyl benzoates are disclosed of general formula I: <IMAGE> Formula I in which R is R1 or R1O, wherein R1 is C1-C12 alkyl, m and n are 0 or 1 provided that (n+m) is 0 or 1, each of a, b, c and d are independently 0 or 1, provided (a+b+c+d) is not zero, but excluding the case where a and b are 0 and one of c and d is 0, being useful constituents of nematic liquid crystal materials. |