中文摘要：

通过三核铁盐[Fe3O（O2CCH3）6（H2O）3]Cl在吡啶溶液中水解聚合得到铁氧簇合物[Fe11O6（OH）6（O2CCH3）15]（C5H5N）6。晶体结构表明11个铁离子（Ⅲ）中6个位于扭曲的三棱柱的顶点上，其余5个分别位于三棱柱的每个面之外。铁离子锄之间以氧桥或者羟基氧桥相连。变温磁化率证实铁离孚锄之间是反铁磁耦合的。

英文摘要：

A new undecairon（Ⅲ）oxo-hydroxo aggregate [Fe11O6（OH）6（O2CCH3）15]（C5H5N）6 has been synthesized by controlled hydrolytic polymerization in pyridine solution containing oxo-bridged trinuclear ferric salt, [Fe3O（O2CCH3）6（H2O）3]Cl, and tartaric acid. The eleven iron atoms defined a twisted pentacapped trigonal prism with each of the iron center being octahedral coordinated. The six pyridine molecules penetrated the sheath of 15 bidentate bridging acetic ligands to form hydrogen bonds to protons on the six μ3-hydroxo ligands. The temperature-dependent magnetic susceptibility behavior of the undecairon（Ⅲ） aggregate was consistent with a ground state spin ST=1/2 per aggregate and the expected antiferromagnetic exchange interactions between the Fe （Ⅲ） ions. CCDC： 298019.