Synthesis, Crystal Structure And Characterization Of Organic Borate And Thiourea Complex With Channels

A novel tetraborate and three new complexes were synthesized by hydrothermal methods. The structures of these compounds were determined by single crystal X-ray diffraction. FT-IR spectrum, Raman spectrum and thermal analysis were used for further characterization.(1) A new organic tetraborate (H₃NCH₂CH₂NH₃)[B₄O₅(OH)₄] was synthesized by hydrothermal methods. It crystallizes in the monoclinic system, space group C2/c.The structure of this compound consists of (H₃NCH₂CH₂NH₃)²⁺ and isolated [B₄O₅(OH)₄]^- anions. The tetraborate anions are linked by hydrogen bonds to form a complex supormolecular network with channels. The organic moieties reside in the channels and intact with the polyborate network through hydrogen bonds.(2) Two new complexes [Co(H₂NCSNH₂)₄]Cl₂, and [Ni(H₂NCSNH₂)₄]Cl₂ were synthesized by hydrothermal methods. They crystallize in the tetragonal system,but in space group P4(2)/n and I4 respectively. The fundament of this compound is composed of an octahedron with a cobalt atom as the center ,thiourea and chlorine as the ligands. The fundament blocks of two complexes are linked by hydrogen bonds to form a supormolecular network with channels which are surrounded by thiourea ligands.(3) A new nickel complex [Ni(C₆N₄H₁₈)(C₃N₂H₉)]Cl₂ was synthesized by hydrothermal methods. It crystallizes in the orthorhombic system, space group Pbca. The structure of the complex consists of a symmetrical structural unit [Ni(C₆N₄H18)(C3N2H9)]2+,two chlorine atoms and a lattice water. The two chlorine atoms and lattice water are linked to the symmetrical structural unit [Ni(C₆N₄H₁₈)(C₃N₂H₉)]²⁺ by hydrogen bonds,forming a firm supormolecular network.(4) The rules of hydrothermal synthesis for organic-inorganic borate and complex were discussed.