| abstract |
PCT No. PCT/GB93/01133 Sec. 371 Date Apr. 18, 1995 Sec. 102(e) Date Apr. 18, 1995 PCT Filed May 28, 1993 PCT Pub. No. WO93/25631 PCT Pub. Date Dec. 23, 1993Liquid crystal compounds having the formula (I) <IMAGE> (I) <IMAGE> in which A1 is alkyl, alkoxy or alkenyl; X1, X2, X3 and X4 are independently halogens, m, n, p and q are independently 0, 1, 2, 3 or 4 such that m+n+p+q NOTEQUAL 0; Y is O or COO; and A2 is an end group of the formula (II), <IMAGE> (II) where Z is halogen, CH3, CN, CF3 or, CHF2; R is a linear or branched alkyl group or H; and R1 is a linear or branched alkyl group or H. |