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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (11): 2022-2028. 上一篇    下一篇

研究论文

夹心型杂多化合物Na_9[CeW_(10)O_(36)]·34H_2O的合成及晶体结构

薛岗林;刘斌;王文亮;李谦定;李恒新   

  1. 西北大学化学系,西安(710069);陕西师范大学化学系,西安(710062);西安石 油学院石油化工系,西安(710065)
  • 发布日期:2002-11-15

Synthesis and Crystal Structure of Na_9[CeW_(10)O_(36)]·34H_2O

Xue Ganglin;Liu Bin;Wang Wenliang;Li Qianding;Li Hengxin   

  1. Department of Chemistry, Northwest University, Shaonxi Key Laboratory of Physico-Inorganic Chemistry,Xian(710069);Department of Chemistry, Shaanxi Normal University,Xian(710062);Department of Petroleum and Chemistry, Xian Petroleum College,Xian(710065)
  • Published:2002-11-15

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在pH≈6.5及NaAsO_2和Co(NO_3)_3·6H_2O存在下，Na_2WO_4·2H_2O 与Ce (NO_3)_3·6H_2O反应，得到了Na_9[CeW_(10)-O_(36)]·34H_2单晶。用元素分析 及X射线单晶衍射法确定了其组成与结构，晶体学数据为：a = 1.3010(5) nm, b = 1.3072(5) nm, c = 1.9962(8) nm, α= 101.073(7) °, β = 104.411(5) ° γ = 90.473(4) °, V = 3.221(2) nm~3，空间群P1，V=3.211(2)nm~3, Z = 4, 最终R因子[1>2σ(I)]R_1=0.0424, wR_2 = 0.0549, R因子（全部数据）R_1=0. 1357, wR_2 = 0.0808.[CeW_(10)O(36)]~(9-)具有D_(4d)对称性。

关键词: 杂多酸, 钨酸盐, 晶体结构, 铈化合物, 钨化合物

The heteropolytungstate Na_9[CeW_(10)O_(36)]·34H_2O is obtained by the reaction of Na_2WO_4·2H_2O with Ce(NO_3)_3·6H_2O in pH ≈ 6.5 and in the presence of NaAsO_2 and Co(NO_3)_3·6H_2O. The structure and chemical composition are determined by X-ray diffraction analysis and elemental analysis. The crystal is triclinic, space group: P1 with a = 1.3010 (5) nm, b = 1.3072 (5) nm, c = 1.9962 (8) nm, α = 101.073 (7) °, β= 104.411 (5) °, γ = 90.473 (4) °, V = 3.211 (2) nm~3, Z = 4, R_1 = 0.0424, wR_2 = 0.0549 [1 > 2σ(I)], R_1 = 0.1357, wR_2 = 0. 0808 (all data). [CeW_(10)O_(36)]~(9-) has D_(4d) symmetry.

Key words: HETEROPOLYACID, TUNGSTATE, CRYSTAL STRUCTURE, CERIUM COMPOUNDS, TUNGSTEN COMPOUNDS

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