Bis­(ethyl­enedi­ammonium) tetra-μ-oxo-tetrakis­[(nitrilo­triacetato)­titanate(IV)] monohydrate.

The asymmetric unit of the title compound, (C2H10N2)2[Ti4O4(C6H6NO6)4], consists of halves of two centrosymmetric tetrameric [Ti4O4{N(CH2COO)3}4]4− anions, two [H3N(CH2)2NH3]2+ cations and a disordered mol­ecule of water of crystallization. In the [Ti4O4{N(CH2COO)3}4]4− tetramer, each Ti atom is coord­inated by one nitrilo­tri­acetate ligand and two μ-oxo ligands, so that four titanium and four μ-O atoms form an eight-membered ring. The tetramers are connected by hydrogen bonds with [H3N(CH2)2NH3]2+ cations and with water mol­ecules, leading to an intricate three-dimensional network. [ABSTRACT FROM AUTHOR]