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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Synthesis and X-Ray Structural Study of Magnesium (1,3-Propanediaminetetraacetato)nickelate(II) Octahydrate, Mg[Ni(1,3-pdta)]·8H_2O. Structural Parameters and Strain Analysis of [M(1,3-pdta)]~(n-) Complexes in Relation to Their Octahedral Distortion
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Synthesis and X-Ray Structural Study of Magnesium (1,3-Propanediaminetetraacetato)nickelate(II) Octahydrate, Mg[Ni(1,3-pdta)]·8H_2O. Structural Parameters and Strain Analysis of [M(1,3-pdta)]~(n-) Complexes in Relation to Their Octahedral Distortion

机译：八水合（1,3-丙二胺四乙酸）镍（II）镁Mg [Ni（1,3-pdta）]·8H_2O的合成及X射线结构研究。 [M（1,3-pdta）]〜（n-）配合物的结构参数和应变分析及其八面体形变

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摘要

The hexadentate complex Mg[Ni(1,3-pdta)]·8H_2O (1,3-pdta = 1,3-propanediaminetetraacetate ion) was prepared and its structure established by X-ray crystallography. The complex salt crystallizes in the space group Pnna (#52) of the orthorhombic crystal system with a = 13.251(2), b = 11.645(2), c = 13.818(3) A and Z = 4. The Ni(II) ion is sur-rounded octahedrally by two nitrogen and four oxygen atoms of the ligand. The Mg cation is bonded octahedrally to six water molecules. Both complex ions utilize a two-fold symmetry axis that is present in the crystal. The conformations of the chelate rings were found to be envelope or twist for the glycinates and skew-boat for the six-membered diamine ring. A comparison of structures of hexadentate [M(1,3-pdta)]~n complexes shows an expected variation in their octahedral distortion depending on the central metal ion M. Some spectral characteristics of the complex studied have also been reported.
机译：制备六齿配合物Mg [Ni（1,3-pdta）]·8H_2O（1,3-pdta = 1,3-丙二胺四乙酸根离子），并通过X射线晶体学确定其结构。复盐在正交晶体系统的空间群Pnna（＃52）中结晶，其中a = 13.251（2），b = 11.645（2），c = 13.818（3）A和Z = 4.Ni（II）离子被配体的两个氮原子和四个氧原子八面体环绕。 Mg阳离子八面体结合到六个水分子上。两种复合离子都利用晶体中存在的两个对称轴。已发现螯合环的构象对于甘氨酸盐为包膜或扭曲，而对于六元二胺环则为偏斜皿。六齿[M（1,3-pdta）]〜n配合物的结构比较表明，它们的八面体畸变取决于中央金属离子M的预期变化。还报道了该配合物的某些光谱特征。

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