The title compounds, [Co（H2O）6]（OVA）2·2H2O 1, [Ni（H2O）6]（OVA）2·2H2O 2 and [Zn（OVA）2·2H2O] 3 （HOVA = o-vanillic acid = 2-hydroxy-3-methoxybenzoate）, were synthesized and characterized by sing...The title compounds, [Co（H2O）6]（OVA）2·2H2O 1, [Ni（H2O）6]（OVA）2·2H2O 2 and [Zn（OVA）2·2H2O] 3 （HOVA = o-vanillic acid = 2-hydroxy-3-methoxybenzoate）, were synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR and TGA. Compounds 1 and 2 are both of triclinic with space group P1. The metal atom coordinated by six water molecules displays a slightly distorted octahedral configuration. Interestingly, the carboxyl group from HOVA ligand does not coordinate to the metal atom. Correspondingly, compound 3 belongs to the monoclinic system, space group C2/c. Each zinc（Ⅱ） atom exhibits a distorted four-coordinated tetrahedral geometry. Two monodentate carboxyl groups link one zinc（Ⅱ） atom to form a mononuclear molecule. The structure feature is different from that of compounds 1 and 2, which could be attributed to the different coordinated numbers and radii of Co（Ⅱ）, Ni（Ⅱ） and Zn（Ⅱ） atoms.展开更多
基金supported by the National Natural Science Foundation of China (No. 20573073)the Natural Scientific Research Foundation of Shaanxi Provincial Education Office of China (No. 09JK826, 08JZ82 and 08JK490)
文摘The title compounds, [Co（H2O）6]（OVA）2·2H2O 1, [Ni（H2O）6]（OVA）2·2H2O 2 and [Zn（OVA）2·2H2O] 3 （HOVA = o-vanillic acid = 2-hydroxy-3-methoxybenzoate）, were synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR and TGA. Compounds 1 and 2 are both of triclinic with space group P1. The metal atom coordinated by six water molecules displays a slightly distorted octahedral configuration. Interestingly, the carboxyl group from HOVA ligand does not coordinate to the metal atom. Correspondingly, compound 3 belongs to the monoclinic system, space group C2/c. Each zinc（Ⅱ） atom exhibits a distorted four-coordinated tetrahedral geometry. Two monodentate carboxyl groups link one zinc（Ⅱ） atom to form a mononuclear molecule. The structure feature is different from that of compounds 1 and 2, which could be attributed to the different coordinated numbers and radii of Co（Ⅱ）, Ni（Ⅱ） and Zn（Ⅱ） atoms.
