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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >A tetranuclear manganese cluster with a star-shaped Mn4O6 core motif: Directed synthesis using a mononuclear precursor complex
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A tetranuclear manganese cluster with a star-shaped Mn4O6 core motif: Directed synthesis using a mononuclear precursor complex

机译:具有星形Mn4O6核心基序的四核锰簇:使用单核前体配合物进行定向合成

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The tetranuclear manganese(II) complex [Mn-4(PPi)(6)](BPh4)(2) (2) (Hppi = 2-pyridylmethyl-2-hydroxyphenylimine) is prepared by using the precursor complex [Mn(PPi)(2)]-H2O (1). Based on UV/Vis- and IR-spectroscopy data in combination with mass spectrometry it has been concluded that I is a mononuclear neutral Mn-II complex, in which two ppi ligands chelate the manganese atom. Compound 2 crystallizes in the tri-clinic space group P (1) over bar (no. 2), with a = 17.500(3), b = 17.955(4), c = 19.101(4) Angstrom, alpha = 113.79(3)degrees, beta = 111.33(3)degrees, gamma = 93.91(3)degrees, V = 4950(2) Angstrom(3) and Z = 2. In the tetranuclear [Mn-4(PPi)(6)](2+) compplex cation Mn(l), Mn(2), and Mn(3) are equivalently coordinated by two deprotonated Hppi ligands leading to a N4O2 donor set. The environment of the central Mn(4) is formed by coordination of three [Mn(PPi)(2)] fragments resulting in a phenoxo bridged star-shaped Mn4O6 core motif. The average distance of directly adjacent manganese ions is 3.310 Angstrom, whereas the average distance of Mn(1), Mn(2), and Mn(3) among each other is 5.732 Angstrom. [References: 31]
机译:四核锰(II)配合物[Mn-4(PPi)(6)](BPh4)(2)(2)(Hppi = 2-吡啶基甲基-2-羟基苯基亚胺)通过使用前体配合物[Mn(PPi) (2)]-H 2 O(1)。基于UV / Vis和IR光谱数据并结合质谱,可以得出结论:I是单核中性Mn-II络合物,其中两个ppi配体螯合锰原子。化合物2在bar(2号)的三斜空间群P(1)中结晶,a = 17.500(3),b = 17.955(4),c = 19.101(4)埃,alpha = 113.79(3)度,β= 111.33(3)度,伽马= 93.91(3)度,V = 4950(2)埃(3),Z =2。在四核[Mn-4(PPi)(6)](2 +)复合阳离子Mn(1),Mn(2)和Mn(3)由两个去质子化的Hppi配体等效配位,形成N4O2供体。中央Mn(4)的环境是通过三个[Mn(PPi)(2)]片段的配位形成的,从而形成一个苯氧桥式星形Mn4O6核心图案。直接相邻的锰离子的平均距离为3.310埃,而Mn(1),Mn(2)和Mn(3)之间的平均距离为5.732埃。 [参考:31]

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