Syntheses and physical properties of ferrocene derivatives (XV) crystal structure of a liquid crystalline ferrocene derivative, omega-[4-(4-methoxyphenoxycarbonyl)phenoxycarbonyl] undecyl 4-ferrocenyl-benzoate

The crystal structure of a liquid crystalline monosubstituted ferrocene der ivative, omega-[4-(4-methoxyphenoxycarbonyl)phenoxycarbonyl]-undecyl 4-ferr ocenyl-benzoate was determined by the single-crystal X-ray structure analys is. The flexible spacer(undecyl chain) was an all-trans conformation. In or der to form a rod-like structure, the molecule is slightly bent at the subs tituted group bending the ferrocene. Two cyclopentadienyl rings made up an eclipsed type rather than a staggered one. The molecules are arranged in la yers just like those in the smectic phase of the liquid crystals. The aspec t of dipole-dipole interaction, however, was different from that of other h omologues with even number of carbon atoms in the flexible spacer.