Syntheses And Crystal Structures Of N, O Compounds

Heterocyclic compounds and their coordination complexes have received much attention for their application in biological engineering, food perfume chemistry, organic synthesis and dyestuff chemistry. With the developing of structure analysis and evaluation technic, more and more heterocyclic compounds have been found. As a result, the use and applied ranges are spreading quikly. In recent years, many Schiff base derivatives have shown high biological activities, such as insecticide, fungicide and herbicide, etc. In search of novel lead compound containing heterocyclic derivatives with higher potential biological activities, five single crystals were successfully prepared. An X-ray crystallographic analysis was undertaken to elucidate their molecular configuration.In the first chapter, we briefly introduce about the history and development of the complexes, as well as the current survey, research significance and the result in this thesis.In the second chapter, we described the syntheses of three heterocyclic compounds and their metal complexes, 6-ethoxycarbonyl-1H-benzimidazole dihydrate (1), methyl-2-methyl-1H-benzimidazole-6-carboxylate (2) and tetraaquabis(N'-acetoxyl- benzimidazole-N-acetoxyl-K O)-Cobalt(â…¡) dihydrate (3). In 1 and 2, the molecules of are linked into two-dimensional layers by intermolecular interactions as well as some N-0 and N-N short contact. In 3, the molecules are linked by N1-H1A...03 intermolecular interactions into zig-azag chains. The packing is stabilized by dipole-dipole and van der Waals forces.The crystal and molecular structures of Cu[OC₆H₄CNOH]2 have been determined by X-ray crystallography. It crystallizes in the monoclinic system, space group...