Die Kristallstrukturen der Kupfer(II)-oxo-selenite Cu2O(SeO3) (kubisch und monoklin) und Cu4O(SeO3)3 (monoklin und triklin)
Die Kristallstrukturen der Kupfer(II)-oxo-selenite Cu2O(SeO3) (kubisch und monoklin) und Cu4O(SeO3)3 (monoklin und triklin)
复制标题
Kupfer(II)-氧化亚硒酸盐 Cu2O(SeO3)（kubisch 和 monoklin）和 Cu4O(SeO3)3（monoklin 和 triklin）的晶体结构
DOI：
--
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
F. Pertlik
中科院分区：
文献类型：
--
作者：
H. Effenberger;F. Pertlik
在CuO-SeO_2-H_2O体系中合成了四种铜(II)-氧-亚硒酸盐。用单晶X-射线衍射法测定了化合物的晶体结构。化学式、晶格参数和空间群为：Cu2O(SeO_3)-i[a=8.925(1)？，P_(13)]，Cu2O(SeO_3)-II[a=6.987(5)？，b=5.953(4)？，c=8.429(6)？，β=92.17(3)°，P21/n]，CuO(SeO_3)3-i[a=15.990(8)？，b=13.518(8)？，c=17.745(12)？，β=90.49(5)？，P21/a]，和Cu4O(SeO_3)_3-II[a=7.992(6)？，b=8.141(6)？，c=8.391(6)？，α=77.34(3)°，β=65.56(3)？，γ=81.36(3)？，
$$标准杆1$$
除了一个例外，所有的铜原子都是由O原子配位的[4]，[4+1]和[4+2]。最近的四个O原子或多或少是扭曲的“正方形平面”排列。在CuO4方块内，与[4+1]和[4+2]配位的铜原子相比，[4]配位的O原子的铜-氧键长度明显缩短。铜原子配位的例外是具有3位对称性的Cu2O(SeO_3)-I中的Cu(1)原子，它是以三角双锥[5]配位的。这四种晶体结构的一个共同特征是，SeO_3基团外的O原子与四个Cu(II)原子配位。Se原子像往常一样配位，形成SeO_3金字塔。在所有这四个化合物中，铜-氧多面体结合成一个三维网络。
AbstractSyntheses within the system CuO-SeO2-H2O revealed four copper(II)-oxo-selenites. The crystal structures of these compounds were determined by single crystal X-ray techniques. Chemical formulae, lattice parameters and space groups are: Cu2O(SeO3)-I [a=8.925 (1) Å, P213], Cu2O(SeO3)-II [a=6.987 (5) Å,b=5.953 (4) Å,c=8.429 (6) Å, β=92.17 (3)°, P21/n], Cu4O(SeO3)3-I [a=15.990 (8) Å,b=13.518 (8) Å,c=17.745 (12) Å, β=90.49 (5)°, P21/a], and Cu4O(SeO3)3-II [a=7.992 (6) Å,b=8.141 (6) Å,c=8.391 (6) Å, α=77.34 (3)°, β=65.56 (3)°, γ=81.36 (3)°,
$$Par 1$$
].All the Cu atoms are-with one exception-[4], [4+1], and [4+2] coordinated by O atoms. The four nearest O atoms are more or less distorted “square planar” arranged. Within the CuO4 squares the Cu-O bond lengths are significantly shorter for the [4] coordinated O atoms as compared with those of the [4+1] and [4+2] coordinated Cu atoms. The exception in the coordination of the Cu atoms is the Cu(1) atom in Cu2O(SeO3)-I with the site symmetry 3, which is trigonal dipyramidal [5] coordinated. A common feature of these four crystal structures is, that O atoms outside the SeO3 groups are tetrahedrally coordinated by four Cu(II) atoms. The Se atoms are as usual [3] coordinated, building up SeO3 pyramids. In all these four compounds the copper-oxygen polyhedra are combined to a three-dimensional network.