3,5-二甲基吡唑与锌(Ⅱ)配合物的合成、结构及光谱

Syntheses, Structures and Spectra of Complexes of Zinc(Ⅱ) with 3,5-Dimethylpyrazole

采用3,5-二甲基吡唑(HL)与锌(Ⅱ)进行配位作用得到双核配合物[Zn_2(HL)_2(L)_2Cl_2](1)和四核配合物[Zn_4(HL)_4(L)_4(OH)_2](BF4)_2(2)。通过元素分析、UV-Vis、红外光谱、荧光光谱及热分析等技术对化合物进行了表征,并采用X射线单晶衍射技术测定其晶体结构。晶体结构解析表明,配合物1和2都属三斜晶系,P1空间群。在两个配合物结构中,每个中心金属锌(Ⅱ)均具有扭曲的四面体配位构型。双核配合物1中2个金属锌(Ⅱ)由2个双齿配体(L)桥连,以双核配合物1作为次级配位单元,类似的2个次级配位单元中的金属锌(Ⅱ)进一步通过μ-O配位桥连形成四核配合物2。

The complexes [Zn-2（HL）-2（L）-2Cl-2]（1） and [Zn-4（HL）-4（L）-4（OH）-2]（BF-4）-2（2） were synthesized from the reaction of3,5-Dimethylpyrazole（HL） with anhydrous Zn Cl-2 sequentially and characterized by elemental analysis, UV-Vis,FTIR and fluorescence spectroscopy. The crystal structures of the complexes 1 and 2 were determined by X-ray diffraction analysis, and result reveals that each of the two complexes crystallizes in the triclinic system, space group P1, and the coordination environment around zinc（Ⅱ） is best described as distorted tetrahedral configuration in each case. Two zinc ions were bridged by two bidentate ligand（L） in dinuclear zinc （Ⅱ） complex 1.Furthermore, the dinuclear complex is used as secondary ligand unit（sub unit）, and the zinc ions of the same two sub units were bridged by two μ-O to give the tetranuclear zinc（Ⅱ） complex 2. CCDC： 825874, 1; 825875, 2.