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Tetra-ammonium μ-ethyl-enedi-amine-tetra-acetato-1κ3 O,N,O':2κ3 O'',N',O'''-bis-[trioxidotungstate(VI)] tetra-hydrate. 2021

Lamine Yaffa, and Sérigne Fallou Pouye, and Daouda Ndoye, and Waly Diallo, and Mayoro Diop, and Mamadou Sidibe, and Cheikh Abdoul Khadir Diop
Laboratoire de Chimie Minérale et Analytique (LACHIMIA), Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Senegal.

The title compound, (NH4)4[W2(C10H12N2O8)O6]·4H2O, was obtained from a mixture of tungstic acid, ammonia and ethyl-enedi-amine-tetra-acetic acid (H4edta) in a 2:4:1 ratio. The anion of the complex contains two WO3 units and one bridging edta4- ligand. Each central metal atom is tridentately coordinated by nitro-gen and two carboxyl-ate groups of the edta4- ligand, together with the three oxido ligands, producing a distorted octa-hedral coordination environment around each tungsten atom. The center of the carbon-carbon bond of the ethyl-ene bridge represents a crystallographic inversion center. The crystal structure consists of a three-dimensional supra-molecular framework built up by the dinuclear cations, the ammonium counter-ions and the solvent water mol-ecules via hydrogen bonds of the N-H⋯O and O-H⋯O type.

UI MeSH Term Description Entries

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