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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A mixed valence manganese triangle in a trigonal lattice: Structure and magnetism
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A mixed valence manganese triangle in a trigonal lattice: Structure and magnetism

机译:三角晶格中的混合价锰三角:结构和磁性

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The synthesis, structural and magnetic characterisation of trinuclear manganese cluster, [Mn_3O(O_2C-anth)_6(HOCH _3)_3] _1 (where O2C-anth = 9- anthracenecarboxylate), with crystallographic three-fold (C_3) symmetry, are described. The cluster was prepared by a carboxylate exchange reaction between HO2C-anth and [Mn_(12)O_(12)(O _2CMe)_(16)(H_2O_)4] with concomitant fragmentation of the dodecanuclear Mn core of the starting material to form a trinuclear Mn_3(μ~3-O) cluster capped by six carboxylate ligands. Bond valence sum calculations and SQUID magnetometric measurements establish the oxidation states of the metal ions as MnII·2 MnIII which are antiferromagnetically coupled.
机译:描述了三核锰簇[Mn_3O(O_2C-蒽)_6(HOCH _3)_3] _1(其中O2C-蒽= 9-蒽羧酸盐)的合成,结构和磁性表征,具有晶体学三重(C_3)对称性。 。通过HO2C-蒽与[Mn_(12)O_(12)(O _2CMe)_(16)(H_2O_)4]之间的羧酸酯交换反应以及起始材料的十二烷核锰核的碎裂来制备簇三核Mn_3(μ〜3-O)簇,由六个羧酸盐配体封端。键价和计算和SQUID磁力测量确定了反铁磁耦合的金属离子MnII·2 MnIII的氧化态。

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