Two complexes [NiL(HL)](OAc) (1) and [ZnL(OAc)]n (2) (HL=1-(3-ethylpyrazin-2-yl)ethylidene)-4-methylthiosemicarbazide) have been synthesized and structurally determined by single-crystal X-ray diffraction.The results show that the Ni(Ⅱ) ion in 1 is surrounded by two independent thiosemicarbazone ligands with N4S2 donor set,one of which is anionic.However,in complex 2,the Zn(Ⅱ) ion with a distorted tetragonal pyramid coordination geometry is five-coordinated,involving two μ-OCO acetate anions,one tridentate enolizated ligand L-,thus forming one dimension chain-like framework along a axis.Moreover,the fluorescence spectra indicate that the interactions of the complexes with DNA are stronger than that of the thiosemicarbazone ligand.%合成并通过单晶衍射、元素分析、红外光谱表征了配合物[NiL(HL)](OAc) (1)和[ZnL(OAc)]n(2)的结构(HL=3-乙基-2-乙酰吡嗪缩4-甲基氨基硫脲).单晶衍射结果表明,配合物1中的Ni(Ⅱ)离子与来自2个缩氨基硫脲配体的4个N原子和2个S原子配位,其中一个配体为阴离子.而配合物2中,五配位的Zn(Ⅱ)离子采取扭曲的四方锥配位构型,与2个μ-OCO桥联的醋酸根,一个三齿配位的缩氨基硫脲阴离子配位,形成沿a轴方向的一维链状结构.此外,荧光光谱结果表明,配合物与DNA的相互作用强于配体.
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