D. A. Bardonov, K. A. Lyssenko, S. S. Degtyareva, I. E. Nifant’ev, D. M. Roitershtein
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引用次数: 0
摘要
摘要三苯基环戊二烯钾和联吡啶与氯化镧、镨、铒、镥和钪四氢呋喃酸盐反应，生成双核[CpPh3Ln(Bipy)Cl(μ2-Cl)]2（Ln = La (I)、Ln=Er（III）、Lu（IV）、[CpPh3Sc（Bipy）Cl2]（V）配合物（CpPh3=1,2,4-三苯基环戊二烯，Bipy=联吡啶）。在 La...Sc 系列中，REE 半径的减小导致形成单核而非双核配合物，并降低了中心离子的配位数。两个不同 π 系统的共面排列使三苯基环戊二烯配体和联吡啶之间产生了堆叠作用。复合物 I-V 的分子结构是通过 X 射线衍射分析确定的（CCDC 编号：2308609 (I)、2308608 (II)、2308610 (III)、2308611 (IV)、2308607 (V)）。
Structural Diversity of Heteroleptic 1,2,4-Triphenylcyclopentadienyl-Bipyridine Complexes of Rare Earth Metals
The reaction of triphenylcyclopentadienyl potassium and bipyridine with lanthanum, praseodymium, erbium, lutetium, and scandium chloride tetrahydrofuranates results in the formation of binuclear [CpPh3Ln(Bipy)Cl(μ2-Cl)]2 (Ln = La (I), Pr (II)) and mononuclear [CpPh3Ln(Bipy)Cl2(THF)] (Ln = Er (III), Lu (IV), [CpPh3Sc(Bipy)Cl2] (V) complexes (CpPh3 = 1,2,4-triphenylcyclopentadienyl, Bipy = bipyridine). The decrease in the REE radius in the series La…Sc results in the formation of mononuclear instead of binuclear complexes and in a decrease in the coordination number of the central ion. The coplanar arrangement of two different π-systems gives rise to stacking interactions between the triphenylcyclopentadienyl ligand and bipyridine. The molecular structure of complexes I–V was established by X-ray diffraction analysis (CCDC nos. 2308609 (I), 2308608 (II), 2308610 (III), 2308611 (IV), 2308607 (V)).
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