Spectroscopic and structural characterizations of novel water-soluble peroxo[polyaminocarboxylato bis(N-oxido)]niobate(v) complexes
(2003) European Journal of Inorganic Chemistry — n° 4, p. 737-743 (2003)
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- Authors
Devillers, Michel 
- Abstract
- New water-soluble peroxo complexes of niobium(v) with polyaminocarboxylic acids (PAC) have been prepared and characterized by IR and NMR (H-1, C-13, N-15) spectroscopy, as well as by thermal analysis. The synthesis in presence of excess H2O2 leads to the oxidation of the nitrogen atoms of the PAC ligand into N-oxide groups. The compounds obtained correspond to the general formula (A(1))(3)[Nb(O-2)(2-)(LO2)].xH(2)O.yH(2)O(2) [A(1)= NH4+ or CN3H6+ (gu) and L = edta, pdta] in which H4LO2 refers to the bis(N-oxide) derivative of the PAC ligand. The crystal structures of the guanidinium derivatives of the (edta)- and (pdta)Nb complexes have been determined, both showing an eight-coordinate Nb atom with two bidentate peroxo ligands and a quadridentate PAC bis(N-oxido) ligand, resulting in a distorted dodecahedral geometry. The structure of the guanidinium derivative of the edta bis(N-oxido) ligand is also described. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
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Citations
Bayot, D., Declercq, J.-P., Tinant, B., Mathieu, B., & Devillers, M. (2003). Spectroscopic and structural characterizations of novel water-soluble peroxo[polyaminocarboxylato bis(N-oxido)]niobate(v) complexes. European Journal of Inorganic Chemistry, 4, 737-743. https://doi.org/10.1002/ejic.200390102 (Original work published 2003)