Tetronic acids, 4-hydroxy-5H-furan-2-ones, constitute a class of heterocyclic compounds with potent biological and pharmacological activity. The beta, beta'-tricarbonyl moiety plays an integral role in biological systems and forms a variety of metal complexes. In this report, we present the complexation reactions of 3-ethoxycarbonyl tetronic acids with acetates and chlorides of Cu(II) and Co(II). These complexes have been studied by means of EPR spectroscopy and magnetic susceptibility measurements. From the obtained results, a preliminary complexation mode of the ligand is proposed.

中文翻译：

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3-乙氧基羰基四电子酸对Cu(II)和Co(II)金属离子的配位行为。

Tetronic 酸，4-hydroxy-5H-furan-2-ones，是一类具有强大生物和药理活性的杂环化合物。β, β'-三羰基部分在生物系统中起着不可或缺的作用，并形成多种金属配合物。在本报告中，我们介绍了 3-乙氧羰基特电子酸与醋酸盐和氯化物 Cu(II) 和 Co(II) 的络合反应。这些配合物已经通过 EPR 光谱和磁化率测量进行了研究。根据所得结果，提出了配体的初步络合模式。