摘要
Two new complexes, [Ni（dpypda）（H2O）3].（fum） （l） and [Cu2（dpypda）2（fum）2],-8nH2O （2） （dpypda = N2,N4-di（pyridin-2-yl）pyrimidine-2,4-diamine, fum=fumarate）, have been synthesized and characterized by single-crystal X-ray diffraction. Complex 1 is a discrete unit, exhibiting a （4,5,6）-connected framework formed by hydrogen bonding interactions and electrostatic interactions between flee rum dianions and mononuclear [Ni（dpypda）（H2O）3]2＋ cations. However, in complex 2, two crystallographically independent rum dianions adopt the alternative mode of mixed monodentate bridging and chelating and bis（monodentate） bridging Cu（II） atoms to produce a one-dimensional （ID） infinite zigzag chain. And there are unique （H2O）16 water clusters which consist of one cyclic （H2O）4 tetramer and two cyclic （H2O）5 pentamer with six dangling water molecules in its 3D su- pramolecular framework. Both 1 and 2 are characterized by IR and elemental analysis, and the TG properties were also investigated for 2.
Two new complexes, [Ni（dpypda）（H2O）3].（fum） （l） and [Cu2（dpypda）2（fum）2],-8nH2O （2） （dpypda = N2,N4-di（pyridin-2-yl）pyrimidine-2,4-diamine, fum=fumarate）, have been synthesized and characterized by single-crystal X-ray diffraction. Complex 1 is a discrete unit, exhibiting a （4,5,6）-connected framework formed by hydrogen bonding interactions and electrostatic interactions between flee rum dianions and mononuclear [Ni（dpypda）（H2O）3]2＋ cations. However, in complex 2, two crystallographically independent rum dianions adopt the alternative mode of mixed monodentate bridging and chelating and bis（monodentate） bridging Cu（II） atoms to produce a one-dimensional （ID） infinite zigzag chain. And there are unique （H2O）16 water clusters which consist of one cyclic （H2O）4 tetramer and two cyclic （H2O）5 pentamer with six dangling water molecules in its 3D su- pramolecular framework. Both 1 and 2 are characterized by IR and elemental analysis, and the TG properties were also investigated for 2.
基金
the National Natural Science Foundation of China，State Key Program of National Natural Science of China，the Natural Science Foundation of Shaanxi Province，the Natural Scientific Research Foundation of Shaanxi Provincial Education Office of China，Specialized Research Found for the Doctoral Program of Higher Education
