Synthesis, Characterization and Study of Liquid Crystalline Behavior of New Compounds Containing Thiazolidin-4-one, 1, 2, 3-Triazole and Benzimidazol Rings

Abstract

All new compounds synthesized by many reactions starting from a product the compounds [I]_a,b from reaction of 3-phenylenediamine  or 4-phenylenediamine  with chloroacetyl chloride, then the compounds [I]_a,b reacted with potassium thiocyanate to yield compounds [II]_a,b. While  the compounds[III]_a,b yield from  reacted the compounds [I]_a,b with sodium azide then the compounds [III]_a,b reacted 1,3-dipolar cycloaddition reaction  with   acrylic acid to give compounds [IV]_a,b and the later compounds reacted with phenylene diamine to product benzimidazole  compounds [V]_a,b . In addition to synthesized acid chloride compounds [VI]_a,b  by reacted the compounds  [IV]_a,b with   thionyl chloride .Finally reacted the compounds [VI]_a,b with  different aromatic amines to give amide compounds[VII-X]_a,b . The synthesized derivatives characterized viamp. , FTIR, 1HNMR in addition to mass spectroscopy .The liquid crystals properties were studied by using polarized optical microscope (POM) and differential scanning calorimetry(DSC).

Keywords: liquid crystal; benzimidazol; thiazolidin-4-one.