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dc.contributor.authorWang, G
dc.contributor.authorZhou, ZH
dc.contributor.author周朝晖
dc.contributor.authorZhang, H
dc.contributor.authorYe, JL
dc.contributor.authorWan, HL
dc.contributor.author万惠霖
dc.date.accessioned2012-06-23T00:41:36Z
dc.date.available2012-06-23T00:41:36Z
dc.date.issued2000
dc.identifier.citationCHINESE JOURNAL OF STRUCTURAL CHEMISTRY,2000,19(3):181-186zh_CN
dc.identifier.issn0254-5861
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/12935
dc.description.abstractThe sodium-potassium citrate oxotungstate(VI) dimer, Na4K2[W2O5-(cit)(2)]. 11H(2)O (H(4)cit = citric acid) was obtained by the reaction of sodium tungstate (VI) and excess potassium citrate monobasic (KH(3)cit) in neutral solution. The crystal data for the title compound: monoclinic, C12H30K2Na4W2O30, M-r = 1192. 21, space group P2(1)/n, a = 17.427(4), b = 10.022(2), c = 18.631(3) Angstrom, beta = 92.62(1)degrees, V = 3252 (2) Angstrom(3), Z = 4, D-c = 2.435 g/cm(3), mu(MoK alpha) = 76.38 cm(-1), F (000) = 2288. The structure was refined to R = 0.0434 for 6327 independent observed reflections with I>3 sigma(I). The complex anion contains a quasi-centrosymmetric (O2W)O-b(WO2) core with a bent bridging oxo group [W-O-b-W 175. 0(4)degrees]. Each citrate as tridentate ligand coordinates to a tungsten atom through the alkoxy, alpha-carboxyl, and one beta-carboxyl group, while the other P-carboxyl group remains uncoordinated. Principal dimensions are: W-O-b 1. 883(6) Angstrom, (W = O-t)av 1.715(6) Angstrom, W-O (alkoxy) 1.959 (6) Angstrom, W-O (alpha-carboxy) 2. 176(6) Angstrom and W-O (beta-carboxy) 2. 231(6) Angstrom. The tungsten atom is located in a distorted-octahedron environment.zh_CN
dc.language.isoenzh_CN
dc.publisherCHINESE JOURNAL STRUCTURAL CHEMISTRYzh_CN
dc.subjectoxotungstate(VI)zh_CN
dc.subjectcitratezh_CN
dc.subjectcitric acidzh_CN
dc.subjectcitrate methodzh_CN
dc.subjectcrystal structurezh_CN
dc.titleSynthesis, spectroscopic properties and structural characterization of sodium potassium citrato oxotungstate(VI) dimerzh_CN
dc.typeArticlezh_CN


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