| Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]~(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O |
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| 引用本文： | HAN Qiu-Xiaa WANG Jing-Pingb② NIU Jing-Yangb a.Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]~(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O[J].结构化学,2007,26(2):234-238. |
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| 作者姓名： | HAN Qiu-Xiaa WANG Jing-Pingb② NIU Jing-Yangb a |
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| 作者单位： | HAN Qiu-Xiaa WANG Jing-Pingb② NIU Jing-Yangb a (Basic Experiment Teaching Center,Henan University,Kaifeng 475001,China) b (Institute of Molecular and Crystal Engineering,School of Chemistry and Chemical Engineering,Henan University,Kaifeng 475001,China) |
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| 基金项目： | The project was supported by the Natural Science Foundation of Henan University (No. XK04YBRW057) |
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| 摘 要： | Single-crystal X-ray structural analysis of K5Na5H3Nd(α-SiW11O39)2]·6H2O (triclinic, space group P1, a = 13.7738(10), b = 19.722(2), c = 20.6647(15) , α = 111.0090(10), β = 105.1740(10), γ = 98.6870(10)o, Z = 2, V = 4867.2(8), Mr = 5914.40, Dc = 4.026, μ = 26.754 mm-1, F(000) = 5076, R = 0.0750 and wR = 0.2077) reveals that two α-SiW11O39]8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two α-SiW11O391]8- moieties. The Nd(Ⅲ ) ion is substituted for a WO]4+ unit in the "cap" region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na+ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot (13 × 10 ).
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