Synthesis And Properties Of 1,3,4-Thiadiazole And Difunction Compounds

1,3,4-thiadiazole compounds have biological activity such as bactericidal and antibacterial activity, and can be widely used in industry, agriculture, medicine and other fields. In addition, these compounds, mostly having more than one coordination atoms, can coordinate easily with metal ions to form the stable and novel structural and functional coordination polymers. It is of significance to the development of coordination chemistry.Imidazole and its derivatives are an important class of heterocyclic compounds. Imidazole compounds have been widely applied in organic synthesis, medicinal chemistry, imidazolium ionic liquid, supramolecular catalysis, and molecular self-assembly due to the imidazole ring with a conjugate acid-base, complexation, and nucleophilic substitution reaction.Carboxylic acids are the most usefully ligands to build the complex. Carboxyl groups have variety of coordination modes and strong ability of coordination with the metal ions, so they can form the multi-dimensional network structures. These complexes can be used potentially in many fields, such as adsorption separation, catalysis, magnetic materials and optical materials etc. In addition, they can be used to store the gas fuel like methane and hydrogen as the low density porous material, so close attention has been paid to these complexes by more and more chemical researchers. Dicarboxylic compounds have many oxygen atoms, which can coordinate with metal ions, and can form the structural stability and novel functional complex materials. It is important to the development of coordination chemistry, material science and other sciences. Five new compounds, 1,4-bis(2’-(1H-imidazol-1-yl)acetamino)benzene (L1), 1,2- ethylene-bis(oxy-2-naphthoic acid) (L2), 1,3-propyl-bis(oxy-2-naphthoic acid) (L3), 2,5-di(phenylcarbamoylmethylthio)-1,3,4-thiadiazole (L4) and 2,5-di(3-methylphenyl- carbamoylmethylthio)-1,3,4-thiadizole (L5), have been designed and synthesized in this paper, and two single crystals including complexes L4 and L5 were synthesized. Their molecular structures were characterized by EA , IR, 1H and 13C NMR.