title: Crystal structure of di-aqua-(μ2-tri-ethyl-ene-tetra-minehexa-acetato)-dizinc tetra-hydrate.
abstract: The reaction of ZnO and tri-ethyl-ene-tetra-minehexaacetic 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] mol-ecule in the crystalline state. Both Zn(II) ions are octahedrally surrounded and bound by an N2O3 donor set from the H2TTHA(4-) anion and a water mol-ecule; the N atoms are cis and the water mol-ecule is trans to an N atom. The Zn⋯Zn separation is 7.562 (1) Å. An intra-molecular C-H⋯O inter-action is observed and both carboxyl-ate 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.
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Huan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Lu
keywords: Crystal structure; binuclear ZnII complex; crystal structure; tri­ethyl­ene­tetra­minehexa­acetic acid
references.citation: Inorg Chem. 2007 Oct 15;46(21):8454-6
references.pmid: 17854175
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2013 Feb 1;69(Pt 2):m97
references.pmid: 23424439
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr C. 2003 Nov;59(Pt 11):m456-8
references.pmid: 14605389
references.citation: Antioxid Redox Signal. 2014 May 10;20(14):2210-24
references.pmid: 24382261
references.citation: Inorg Chem. 2006 May 15;45(10):3949-57
references.pmid: 16676953