(C_3H_5N_2)_2Na_8[{Co(H_2O)}_2WO(H_2O)(AsW_9O_(33))_2]·33H_2O的合成及晶体结构 |
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引用本文: | 刘雪梅,付峰,徐海升,薛岗林. (C_3H_5N_2)_2Na_8[{Co(H_2O)}_2WO(H_2O)(AsW_9O_(33))_2]·33H_2O的合成及晶体结构[J]. 西安石油大学学报(自然科学版), 2007, 22(6): 85-88 |
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作者姓名: | 刘雪梅 付峰 徐海升 薛岗林 |
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作者单位: | 1. 西安石油大学,应用化学重点实验室,陕西,西安,710065;西北大学,化学系,陕西省物理无机化学重点实验室,陕西,西安,710069 2. 延安大学,化学化工学院陕西省化学反应工程重点实验室,陕西,延安,716000 3. 西安石油大学,应用化学重点实验室,陕西,西安,710065 4. 西北大学,化学系,陕西省物理无机化学重点实验室,陕西,西安,710069 |
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摘 要: | 在pH=5.5和80℃下,Na_2WO_4.2H_2O,NaAsO_2.6H_2O,Co(NO_3)_2.6H_2O和咪唑的水溶液反应,得到了高产率的夹层型杂多酸盐(C_3H_5N_2)_2Na_8[{Co(H_2O)}_2WO(H_2O)(AsW_9O_(33))_2].33H_2O单晶,用X射线单晶衍射法及元素分析确定了其结构.结果表明:该晶体属四方晶系,空间群P-421m,a=1.7191(10),c=1.6376(13)nm,V=4.840(5)nm3,Z=2,R1=0.0484,wR2=0.0714(I>2σ),杂多阴离子[{Co(H_2O)}_2WO(H_2O)(AsW_9O_(33))2]10-具有C2ν对称性,Co2+的配位数均为5.讨论了(CHN)Na[{Co(HO)}WO(HO)(AsWO)].33HO的形成条件.
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关 键 词: | 杂多钨酸盐 晶体结构 钴 砷 钨 咪唑 |
文章编号: | 1673-064X(2007)06-0085-04 |
修稿时间: | 2007-06-20 |
Synthesis and Crystal Structure of Heteropolytungstate(C3H5N2)2Na8[{Co(H2O)}2WO(H2O)(AsW9O33)2]·33H2O |
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Abstract: | The novel sandwich heteropolytungstate(C_3H_5N_2)_2Na_8[{Co(H_2O)}_2WO(H_2O)(AsW_9O_33)_2]·33H_2O is obtained by the reaction of Na_2WO_4·2H_2O with NaAsO_2·6H_2O,Co(NO_3)_2·6H_2O and imidazole in pH≈5.5 and at 80 ℃.Its structure is determined by X-ray diffraction analysis and element analysis.This is a salt,which crystallizes in the tetragonal space group P-421m with a=1.719 1(10) c=1.637 6(13) nm,V=4.840(5) nm3,Z=2,R1=0.048 4,wR2=0.071 4(I>2σ).The structure of [{Co(H_2O)}_2WO(H_2O)(AsW_9O33)_2]10-reveals a sandwose-like arrangement of two {α-B-AsW_9} moieties enclosing two Co(H_2O)2+ which coordinated number is five. |
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Keywords: | heteropolytungstate crystallographic structure cobalt arsenic tungsten imidazole |
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