Three novel crystal structures were obtained from iron(III) acetylacetonate and 2,6‐pyridinedicarboxylic acid. The structures elucidated were found to be dependent on the temperature and length of time allowed for the reaction. The product of the reaction between iron(III) acetylacetonate and 2,6‐pyridinedicarboxylic acid in acetonitrile at room temperature is [FeC₁₂H₁₂NO₇]·CH₃CN, (I). When the reaction temperature was increased to 60°C, FeC₁₂H₁₀NO₆, (II), was isolated after 2 h and [FeC₁₂H₁₀NO₆]₄, (III), was isolated after 24 h. (I) is a discrete complex, whereas (II) and (III) form tetramers.

中文翻译：

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使用温度和时间控制晶体结构。

从乙酰丙酮铁（III）和2,6-吡啶二羧酸获得了三个新颖的晶体结构。发现阐明的结构取决于反应所允许的温度和时间长度。室温下，乙酰丙酮铁（III）与2,6-吡啶二羧酸在乙腈中的反应产物为[FeC ₁₂ H ₁₂ NO ₇ ]·CH ₃ CN，（I）。当反应温度升高至60°C时，2 h后分离出FeC ₁₂ H ₁₀ NO ₆（II）和[FeC ₁₂ H ₁₀ NO ₆ ] ₄24小时后分离出，（III）。（I）是离散的络合物，而（II）和（III）形成四聚体。