Abstract
The research involved synthesis and characterization of three liquid crystal compounds of Schiff’s base (mesogenicleg and and its complexes with ions of ( K2PtCl6) , (MnCl2 .4H2o) as the following structure. The leg and and their complexes have been characterized by Ultra violet (UV), a spectrophotometer Infrared (IR), , polarizing microscope equipped with heating stage, It was found that these compounds have nematic liquid crystalline status (enantiotropic).The crystal structure was studied for prepared compounds using X-ray diffractometer (XRD), and it has shown that ligands have a mixture of Cubic and Hexagonal structures, The complex (CE (1) ) is a mixture of Cubic and Tetragonal structures , while the second complex (CE (2)) It was found to be a combination of Orthorhombic, Rhombohedral and Monoclinic structure.
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