Eight-coordination. Synthesis and structure of the schiff-base chelate bis(N,N'-disalicylidene-1,2-phenylenediamino)Cerium(IV)
Eight-coordination. Synthesis and structure of the schiff-base chelate bis(N,N'-disalicylidene-1,2-phenylenediamino)Cerium(IV)
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DOI：
10.1016/s0020-1693(00)82406-8
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发表时间：
1984-05
影响因子：
2.8
通讯作者：
A. Terzis;D. Mentzafos;H. Tajmir-Riahi
中科院分区：
文献类型：
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作者：
A. Terzis;D. Mentzafos;H. Tajmir-Riahi
为了阐明决定八坐标配合物几何形状的因素，我们合成并表征了配合物（N,N ' -二二苯基二氨基）铈（IV）， Ce(salophen)2的结构特征。它是一个正方形的反棱镜种，每个螯合配体跨越sss边。CeO键的平均距离为2.214 Å，明显短于CeN键的平均距离2.606 Å。两个配体呈夹心取向，梯形平面相交于88.2°。δ角分别为7.0°、2.6°、56.5°和55.9°，φ分别为30.0°和28.6°。配合物在空间群P21/C中结晶，Z = 4, a = 11.090(2) Å， b = 16.332(3) Å， C = 18.916(3) Å， β = 70.10(2)°，dcalc= 1.585 g/cm3。
In an effort to elucidate the factors that determine the geometry of eight-coordinate complexes we synthesized and structurally characterizes the complex bis(N,N′-disalicylidene-1,2-phenylenediamino)Cerium(IV), Ce(salophen)2. It is a square antiprismatic species with each chelating ligand spanning sss edges. The CeO bonds average 2.214 Å, appreciably shorter than CeN distance of 2.606 Å. The tow ligands have the sandwich orientation and the trapezoidal planes intersect at 88.2°. The δ angles are 7.0°, 2.6°, 56.5° and 55.9° and the ϕ angles are 30.0° and 28.6°. The complex crystallized in space group P21/C with Z = 4, a = 11.090(2) Å, b = 16.332(3) Å, c = 18.916(3) Å, β = 70.10(2)° and dcalc= 1.585 g/cm3.