Crystal structure of diaqua(μ2-triethylenetetraminehexaacetato)dizinc tetrahydrate

• Main Authors: Huan Liu, Li-Ping Lu
• Format: Article
• Language: English
• Published: International Union of Crystallography 2015-03-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: Crystal structure; binuclear ZnII complex; triethylenetetraminehexaacetic acid; crystal structure
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989015002108

The reaction of ZnO and triethylenetetraminehexaacetic acid (H6TTHA) in aqueous solution after refluxing yields the binuclear title compound, [Zn2(C18H26N4O12)(H2O)2]·4H2O. There is a centre of symmetry in the [Zn2(H2TTHA)(H2O)2] molecule in the crystalline state. Both ZnII ions are octahedrally surrounded and bound by an N2O3 donor set from the H2TTHA4− anion and a water molecule; the N atoms are cis and the water molecule is trans to an N atom. The Zn...Zn separation is 7.562 (1) Å. An intramolecular C—H...O interaction is observed and both carboxylate H atoms are disordered over two adjacent sites. In the crystal, the components are linked by O—H...O and C—H...O hydrogen bonds generating a three-dimensonal network.