Synthesis and crystal structure of a novel double 1:11 series arsenotungstate:[CuI(phen)2]5H6[Sm(AsW11O39)2]·6H2O
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：WANG Jingping NIU Jingyang YAN Qingxia WANG Wei
Key words：hydrothermal synthesis; crystal structure; arsenotungstate; double 1:11 series; rare earths;
Abstract: A novel double 1:11 series arsenotungstate, [CuI(phen)2]5H6[Sm(AsW11O39)2]·6H2O(phen=1,10-phenanthroline) was synthesized by the hydrothermal method and characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. The title compound was monoclinic, space group P21/c, a=3.75710(2) nm, b=1.39776(8) nm, c=3.33735(18) nm, fl=96.967(10)°, V=17.3969(17) nm3, Z=4.Single crystal X-ray structural analyses revealed that the dimeric polyanion, [SmAs2W22O78]1-, consisted of one central Sm3+ ion and two tetradentate heteropoly ligands [AsW11O39]7-. The Sm3+ ion and two tetradentate defective [AsW11O39]7- nions were joined together by the sharing of four oxygen atoms from each heteropoly ligand. The bond valence sum (BVS) calculations of the title compound suggested that all four Cu atoms were in the +1 oxidation sate.
WANG Jingping1，NIU Jingyang1，YAN Qingxia1，WANG Wei1
(1.Institute of Molecalar and Crystal Engineering,School of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China)
Abstract:A novel double 1:11 series arsenotungstate, [CuI(phen)2]5H6[Sm(AsW11O39)2]·6H2O(phen=1,10-phenanthroline) was synthesized by the hydrothermal method and characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. The title compound was monoclinic, space group P21/c, a=3.75710(2) nm, b=1.39776(8) nm, c=3.33735(18) nm, fl=96.967(10)°, V=17.3969(17) nm3, Z=4.Single crystal X-ray structural analyses revealed that the dimeric polyanion, [SmAs2W22O78]1-, consisted of one central Sm3+ ion and two tetradentate heteropoly ligands [AsW11O39]7-. The Sm3+ ion and two tetradentate defective [AsW11O39]7- nions were joined together by the sharing of four oxygen atoms from each heteropoly ligand. The bond valence sum (BVS) calculations of the title compound suggested that all four Cu atoms were in the +1 oxidation sate.
Key words:hydrothermal synthesis; crystal structure; arsenotungstate; double 1:11 series; rare earths;
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