Abstract
The properties of [MnMo9O32]6− heteropoly anion (HPA 1), as a macroligand with respect to the lanthanide ions, were studied. The band due to heteronuclear charge transfer Ce(III)4f → Mo(VI)4d was isolated. The crystal structure of heteropoly complex (HPC) [La2(H2O)12 (MnMo9O32)] ⋅ 2H2O (I) was determined (space group B2/n, a = 23.597(2) Å, b = 19.832(1) Å, c = 11.810(1) Å, γ = 132.390(6)°, V = 4083.4(6) Å3, Z = 4, R = 3.4%). In HPC, the [MnMo9O32]6− ligand (HPA 1) is a hexadentate ligand, which provides for coordination with each of the two La3+ ions three terminal O atoms of the cis-MoO2 groups. This HPC is peculiar in its neutrality and in the cis-position of the coordination active centers on the ligand surface. The coordination polyhedron of the La atom (nine-vertex polyhedron) is formed by three terminal O atoms of HPA1 and by six O atoms of water molecules. IR study revealed that the terminal O atoms of the cis-MoO2 groups of a ligand are involved in coordination with La.
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Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 6, 2005, pp. 427–435.
Original Russian Text Copyright © 2005 by Gavrilova, Molchanov.
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Gavrilova, L., Molchanov, V.N. Complexation of Heteropoly Anion [MnMo9O32]6− with Lanthanide Ions. Russ J Coord Chem 31, 401–409 (2005). https://doi.org/10.1007/s11173-005-0111-5
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DOI: https://doi.org/10.1007/s11173-005-0111-5