Acta Cryst. (2004). E60, m1084-m1086  [ doi:10.1107/S1600536804016186 ]

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

Q.-Z. Sun, Q.-H. Sun, H.-H. Zhang, C.-C. Huang, Y.-N. Cao and R.-Q. Sun

Abstract: 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 -oxo ligands, so that four titanium and four -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.

Online 9 July 2004

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