A direct three-component reaction for the isolation of a nonanuclear iron(III) phosphonate
A direct three-component reaction for the isolation of a nonanuclear iron(III) phosphonate
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DOI：
10.1002/ejic.201402371
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发表时间：
2014-09
影响因子：
2.3
通讯作者：
Joydeb Goura;Junjie Liu;P. Goddard;V. Chandrasekhar
中科院分区：
文献类型：
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作者：
Joydeb Goura;Junjie Liu;P. Goddard;V. Chandrasekhar
研究了非核膦酸铁[Fe9III(μ3-O)4(O3PC5H9)3(O2CCMe3)13]·（EtOH）0.5·（Et2O）0.5(1)]的合成、结构和磁性。化合物1是在三乙胺存在下，由无水氯化铁、环戊基膦酸和戊酸直接反应得到的。化合物1具有畸变二十面体结构；其中9个顶点被FeIII占据，而另外3个则被磷酸环戊基配体的磷原子占据。穆斯堡尔光谱证实了高自旋FeIII的存在。低温磁学研究表明Fe3+离子之间存在强反铁磁耦合。
The synthesis, structure, and magnetism of a nonanuclear iron(III) phosphonate, [Fe9III(μ3-O)4(O3PC5H9)3(O2CCMe3)13]·(EtOH)0.5·(Et2O)0.5 (1), is described. Compound 1 was obtained in the direct reaction of anhydrous ferric chloride, cyclopentylphosphonic acid, and pivalic acid in the presence of triethylamine. Compound 1 possesses a distorted icosahedral structure; nine of the vertices are occupied by FeIII, whereas three others are occupied by the phosphorus atoms of the cyclopentylphosphonate ligand. Mossbauer spectroscopy of 1 confirms the presence of high-spin FeIII. Low-temperature magnetic studies reveal the presence of strong antiferromagnetic coupling between the Fe3+ ions.