Synthesis and Structural Studies of a Cu(II) Complex with 3-pyridylformylpyruvic Acid Ethyl Ester
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摘要: 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。
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关键词:
- 晶体结构
Abstract: 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.-
Keywords:
- Crystal structure
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[3] Cui Y, Yue Y, Qian G, et al. Luminescent Functional Metal–Organic Frameworks [J]. Chemical Reviews, 2011, 112 (2): 1126-62.
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[5] Li J-R, Kuppler R J, Zhou H-C. Selective gas adsorption and separation in metal-organic frameworks [J]. Chemical Society Reviews, 2009, 38 (5): 1477-504.
[6] Rocha J, Carlos L D, Paz F a A, et al. Luminescent multifunctional lanthanides-based metal-organic frameworks [J]. Chemical Society Reviews, 2011, 40 (2): 926-40.
[7] Xuan W, Zhu C, Liu Y, et al. Mesoporous metal-organic framework materials [J]. Chemical Society Reviews, 2012, 41 (5): 1677-95.
[8] Liu L-F, Cai B, He C-S, et al. Coordination and topology versatility of metal-organic frameworks based on cadmium iodide and 5-azaarylpyrazole-3-carboxylic acids [J]. Inorganic Chemistry Communications, 2013, 30 (1): 105-10.
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