Synthesis and Structure of Tungsten(Ⅵ) citrate Complex K6[W2O5(cit)2]·5H2O

Chemical Research in Chinese Universities ›› 1998, Vol. 14 ›› Issue (3): 236-240.

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Synthesis and Structure of Tungsten(Ⅵ) citrate Complex K₆[W₂O₅(cit)₂]·5H₂O

XING Yong-heng¹, XU Ji-qing¹, SUN Hao-ran¹, WANG Zhuo¹, HUANG Xiao-ying²

1. Department of Chemistry, Jilin University, Changchun 130023;
2. StateKey Labortory of Structural Chemistry, Fujian Institute of Resear chon the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002

Received:1997-04-28 Online:1998-08-24 Published:2011-08-17
Supported by:
Supportedbythe National Natural Science Foundation of China and State Key Laboratory of Structural Chemistry,Fujian Institute of ResearchontheStructure of Matter,Chinese Academy of Sciences.

Abstract

Abstract: A new tungsten(Ⅵ) citrate complex K₆[W₂O₅(cit)₂]·5H₂O which differs from Nasub>6[W₂O₅·(cit)₂]·10H₂O, was synthesized by means of an aqueous solution reaction of (NH ₄)₂WS₄ and K₃ cit. The single crystal X-ray diffraction study showed that the crystal belongs to a triclinic system. The space group is P^-1 with a =1.186 8(3) nm, b =1.371 8(7) nm, c =1.025 3(3) nm; α =107.79(4)°, β =99.27(2)°, γ =66.30(2)°, V =1.454(2) nm³, Z =2. The complex anion contains a O₂WOWO₂ skeleton with a bridging oxo group and two citrate ligands. Each citrate as a terdentate ligand coordinates to one tungsten atom by means of the deprotonated hydroxy, α-carboxylate, and β-carboxylate groups.

Key words: Synthesis, Citrate, Crystal structure

XING Yong-heng, XU Ji-qing, SUN Hao-ran, WANG Zhuo, HUANG Xiao-ying . Synthesis and Structure of Tungsten(Ⅵ) citrate Complex K₆[W₂O₅(cit)₂]·5H₂O[J]. Chemical Research in Chinese Universities, 1998, 14(3): 236-240.

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Synthesis and Structure of Tungsten(Ⅵ) citrate Complex K₆[W₂O₅(cit)₂]·5H₂O

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