| abstract |
Glass-like liquid crystalline esters have the general formula I <IMAGE> R<1>=CnH2n+1 or OCnH2n+1 (n=H2); R<2>=R<1>, (CH2)mCN (m=0-4), NO2, Br, H or <IMAGE> R<3> and R<4>=H, CnH2n+1, OCnH2n+1, NO2 or CN; or R<2> and R<3> together =OCH2O; <IMAGE> or <IMAGE> B=as A or <IMAGE> X=CO, C(R<5>)=N-OOC (R<5>=CnH2n+1, n=0-4) or COY (Y=Z<1)<CH2)2Z<2> in which Z<1> and Z<2>= O, S, NR<5>, CHR<5>, CO, CH=CH or -N-CR<5>- and n=0-10 or Z<2>=a single bond or OOC). |