Lead(ii) complexes of bis- and tris-bidentate compartmental ligands based on pyridyl-pyrazole and pyridyl-triazole fragments: coordination networks and a discrete dimeric box
Lead(ii) complexes of bis- and tris-bidentate compartmental ligands based on pyridyl-pyrazole and pyridyl-triazole fragments: coordination networks and a discrete dimeric box
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基于吡啶基-吡唑和吡啶基-三唑片段的双齿和三齿室配体的先导(ii)复合物：配位网络和离散二聚盒
作者：
Najar A
一系列的六个房室配体，含有两个或三个二齿螯合吡啶基-三唑或吡啶基-吡唑连接到一个中心的芳香族间隔单元，已被用来制备Pb（II）的配合物，其结构特征。五个配合物形成无限配位网络，包括一维链和四个二维片，包括三个例子的（6，3）网，和一个例子的（4，4）网。其中一个配合物是一个离散的双核二聚体配合物，其中两个桥接配体跨越两个金属离子在一个'mesocate'盒状排列。Pb（II）中心显示出一系列的配位数和几何形状，从扭曲的六坐标与立体化学活性的孤对电子，相当规则的八坐标与正方形反棱柱几何形状。
A series of six compartmental ligands, containing two or three bidentate chelating pyridyl-triazole or pyridyl-pyrazole units connected to a central aromatic spacer, has been used to prepare Pb(II) complexes which have been structurally characterised. Five of the complexes form infinite coordination networks including a one-dimensional chain and four two-dimensional sheets comprising three examples of (6,3) nets, and one example of a (4,4) net. One of the complexes is a discrete dinuclear dimeric complex in which two bridging ligands span two metal ions in a ‘mesocate’ box-like arrangement. The Pb(II) centres show a range of coordination numbers and geometries, from distorted six-coordinate with a stereochemically active lone pair of electrons, to fairly regular eight-coordinate with a square antiprismatic geometry.