3-吡啶甲酰基丙酮酸乙酯铜配合物的合成和结构研究

以3-乙酰基吡啶和草酸二乙酯为原料，合成得到3-吡啶甲酰基丙酮酸乙酯（简称HL），核磁共振波谱表明该物质的?-二酮部分在溶液中采取烯醇式结构。通过界面扩散法合成了该配体的第一个配合物{CuL2}n，并用单晶X-射线衍射进行了详细的结构分析。该配位聚合物中Cu(II)与四个L?配体形成拉长的反式CuN2(OO)2八面体配位构型。两种晶体学独立的L?配体都是以?-二酮基的两个O原子螯合一个Cu(II), 以吡啶N原子与另一个Cu(II)配位，形成二维网格结构。

Synthesis and Structural Studies of a Cu(II) Complex with 3-pyridylformylpyruvic Acid Ethyl Ester

Starting from 3-acetylpyridine and diethyl oxalate, 3-pyridylformylpyruvic acid ethyl ester (HL) was prepared. The proton magnetic resonance spectroscopy implies that the ?-dione moiety of HL adopts the enol form. Its first coordination compound, {CuL2}n, was obtained through interface diffusion. The single crystal X-ray diffraction analysis shows that in the complex the Cu(II) atom is surrounded by four L ligands to form an elongated trans-CuN2(OO)2 octahedron. Each of the two crystallographically L ligands bites an Cu(II) atom via the two dionate O atoms and binds another Cu(II) atom via the pyridyl N atom simultaneously. Infinite connection of the Cu(II) atoms and the L ligands leads to formation of a two-dimensional network.