Pyridyl Compounds of Heavier Group 13 and 14 Elements as Ligands for Lanthanide Metals

Pyridyl Compounds of Heavier Group 13 and 14 Elements as Ligands for Lanthanide Metals
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作为镧系金属配体的第 13 族和第 14 族重元素的吡啶基化合物

DOI:
10.1021/om301032x
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发表时间:
2013
期刊:
影响因子:
2.8
通讯作者:
K. Zeckert
K. Zeckert
中科院分区:
化学2区
文献类型:
--
作者:
K. Zeckert

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研究了三种不同的三(2-吡啶基)锡酸酯衍生物与Ln(Ⅱ)化合物[Ln(Cp ~*)~ 2(OEt ~ 2)](Ln = Yb,Sm; Cp ~* = η_5-C_5Me_5)的反应性。因此,[La(Cp)3{Sn(2-py 5 Me)3Li(thf)}](Cp = η5-C5 H5,py 5 Me = C5 H3 N-5-Me)与[Yb(Cp*)2(OEt 2)]反应,得到Yb 2+阳离子被两个三(2-吡啶基)锡酸酯单元和两个未负载的Sn-La键包裹的五金属配合物[Yb{Sn(2-py 5 Me)3La(Cp)3}2](1)。另一方面,双锡酸盐配合物[Yb{Sn(2-py 3 Me)3}2](py 3 Me = C5 H3 N3-Me)与[Yb(Cp*)2(OEt 2)]反应,得到混配配合物[Yb(Cp*){Sn(2-py 3 Me)3}](2)。此外,还通过还原法合成了两个钐配合物[Sm(Cp*)2{MEt 2(2-py 5 Me)2}](M = Ga(3),In(4)).化合物1 - 4均通过核磁共振谱和X射线晶体学研究进行了表征。
Reactivity studies of three different tris(2-pyridyl)stannate derivatives toward the Ln(II) compounds [Ln(Cp*)2(OEt2)] (Ln = Yb, Sm; Cp* = η5-C5Me5) are described. Thus, treatment of [La(Cp)3{Sn(2-py5Me)3Li(thf)}] (Cp = η5-C5H5, py5Me= C5H3N-5-Me) with [Yb(Cp*)2(OEt2)] afforded the pentametallic complex [Yb{Sn(2-py5Me)3La(Cp)3}2] (1) with the Yb2+cation encapsulated by two tris(2-pyridyl)stannate units and two unsupported Sn–La bonds in terminal positions. On the other hand, reaction of the bis(stannate) complex [Yb{Sn(2-py3Me)3}2] (py3Me= C5H3N-3-Me) with [Yb(Cp*)2(OEt2)] gave the heteroleptic complex [Yb(Cp*){Sn(2-py3Me)3}] (2). Moreover, two samarium(III) compounds [Sm(Cp*)2{MEt2(2-py5Me)2}] with M = Ga (3), In (4) were obtained in a reductive approach. Compounds1–4have all been characterized by NMR spectroscopic and X-ray crystallographic studies.
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