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2005
Iron
I 7100
31- 024
Structural and Electrochemical Studies of Dimerization and Rotational
Isomerization in Multi-Iron Silicotungstates. ? The polyoxometalate
K4Na7[(?-SiFe3W9(OH)3O34)2(OH)3]�H2O is synthesized from an aqueous solution
containing Fe(NO3)3, AcONa, and Na9H[?-SiW9O34]�H2O (10 癈, 5 d, 20% yield)
and characterized by cyclic voltammetry. As revealed by single crystal XRD the compound crystallizes in the orthorhombic space group Pbcm with Z = 4. The complex is
isostructural with [(?-SiFe3W9(OH)3O34)2(OH)3]11- except that the edge-shared W3O13
caps in each [SiFe3W9(OH)3O34]4- unit are rotated by 60�. ? (ANDERSON, T. M.;
CAO, R.; NEIWERT, W. A.; HARDCASTLE, K. I.; HILL*, C. L.; AMMAM, M.;
KEITA, B.; NADJO, L.; Eur. J. Inorg. Chem. 2005, 9, 1770-1775; Dep. Chem.,
Emory Univ., Atlanta, GA 30322, USA; Eng.) ? W. Pewestorf
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