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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis, crystal structure and characterization of a new layered lanthanum(III) diselenite hydrogenselenite: La(Se_2O_5)(HSeO_3)(H_2O) centre dot H_2O
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Synthesis, crystal structure and characterization of a new layered lanthanum(III) diselenite hydrogenselenite: La(Se_2O_5)(HSeO_3)(H_2O) centre dot H_2O

机译：新型层状镧（III）硒钙氢硒矿的合成，晶体结构和表征：La（Se_2O_5）（HSeO_3）（H_2O）中心点H_2O

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摘要

Reaction of lanthanum(III) chloride and SeO_2 under acidic condition lead to a new layered lanthanum(III) diselenite hydrogenselenite, La(Se_2O_5)(HSeO_3)(H_2O) centre dot H_2O. The title compound crystallizes in the orthorhombic space group Pbca with cell parameters of a = 7.329 (1), b= 11.013 (2), c = 22.802 (3) A. In the title compound the nine-coordinated lanthanum(III) ions are bridged by Se_2O_5~(2-) and HSeO_3~- anions to form 2D layers normal to the c-axis. The diselenite anion is hexadentate, forming two types of chelating rings, namely a four-membered Ln-O-Se-O ring and a six-membered La-O-Se-O-Se-O ring, and also bridges with two other La(III) ions. The hydrogenselenite group is bidentate bridging and the protonated oxygen atom remains non-coordinated and is involved in the hydrogen bonding with aqua ligand as well as lattice water molecul
机译：氯化镧（III）和SeO_2在酸性条件下的反应产生了新的层状镧（III）二硒铝氢硒矿，La（Se_2O_5）（HSeO_3）（H_2O）中心点H_2O。标题化合物在正交晶空间群Pbca中结晶，单元参数为a = 7.329（1），b = 11.013（2），c = 22.802（3）A。在标题化合物中，九配位的镧（III）离子为由Se_2O_5〜（2-）和HSeO_3〜-阴离子桥接形成垂直于c轴的2D层。二硒键阴离子是六齿的，形成两种类型的螯合环，即一个四元的Ln-O-Se-O环和一个六元的La-O-Se-O-Se-O环，并且还与另外两个桥连La（III）离子。氢硒烃基团是双齿桥连的，质子化的氧原子保持不配位，并参与与水配体以及晶格水分子的氢键结合

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