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首页> 外文期刊>Chinese science bulletin >Single-crystal structure of coordination polymer [Nd_2(C_8H_5NO_4)_3·4H_2O]_∞
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Single-crystal structure of coordination polymer [Nd_2(C_8H_5NO_4)_3·4H_2O]_∞

机译:配位聚合物[Nd_2(C_8H_5NO_4)_3·4H_2O]_∞的单晶结构

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The single-crystal structure of the coordination polymer [Nd_2(C_8H_5NO_4)_3· 4H_2O]_∞ with rhombus-channels is reported in this paper. There are two crystallographically independent Nd(Ⅲ) ions, and each Nd(Ⅲ) ion is in the eight-coordinated environment. Seven of eight oxygen atoms are from six 5-aminoisophthalic acid ligands, the other oxygen atom is given by coordination water. Carboxyl groups link two Nd(Ⅲ) ions using η~(1,1) and η~(1,3) modes. Two carboxyl groups from ligands chelate Nd(Ⅲ) ion to form four-mem-bered rings. Crystal data: Triclinic, space group P14, a = 1.03680(5) nm, b = 1.66934(15) nm, c = 0.88221(14) nm, α = 99.754(2)°, β = 111.169(4)°, γ = 85.400(4)°. Some ligands linking metal Nd(Ⅲ) ions parallel to ab plane form molecular ladders, and the others linking molecular ladders result in rhombus channels along c-axis. These coordinated water molecules and amino groups are pendent in the channels.
机译:报道了具有菱形通道的配位聚合物[Nd_2(C_8H_5NO_4)_3·4H_2O]_∞的单晶结构。有两个晶体学上独立的Nd(Ⅲ)离子,每个Nd(Ⅲ)离子都处于八配位环境中。八个氧原子中的七个来自六个5-氨基间苯二甲酸配体,另一个氧原子由配位水给出。羧基以η〜(1,1)和η〜(1,3)模式连接两个Nd(Ⅲ)离子。配体中的两个羧基与Nd(Ⅲ)离子螯合形成四元环。晶体数据:三斜晶系,空间群P14,a = 1.03680(5)nm,b = 1.66934(15)nm,c = 0.88221(14)nm,α= 99.754(2)°,β= 111.169(4)°,γ = 85.400(4)°。一些与平行于ab平面的金属Nd(Ⅲ)离子连接的配体形成分子阶梯,而另一些与分子阶梯的连接导致沿c轴的菱形通道。这些配位的水分子和氨基在通道中是悬垂的。

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