ORGANOMETALLIC FERROELECTRIC LIQUID-CRYSTALS .3. SYNTHESES AND LIQUID-CRYSTAL PROPERTIES OF ORTHO-PALLADATED BINUCLEAR COMPLEXES OF AZINE, IMINE AND AZO DERIVATIVES

In this paper, we report the syntheses of a series of title complexes from the reaction of azine, imine or azo ligands with Pd(OAc)2 and wit h different bridging groups. Moreover we have investigated the mesomor phic properties of these complexes using DSC and polarizing microscopy . The results show that the mesophase, temperature ranges of complexes are wider than that of corresponding organic ligands. The role of the central organic ligands, the bridging ligands between two metallic nu clei, and terminal carbon number on the mesomorphic behavior was also determined. When the bridging ligands contain an optically active grou p, the complexes appear to exhibit chiral smectic C phase (S(C)).