title: Diammonium aqua-(ethyl-ene-diamine-tetra-acetato)iron(II) trihydrate.
abstract: In the title compound, (NH(4))(2)[Fe(C(10)H(12)N(2)O(8))(H(2)O)]·3H(2)O, the Fe(II) center is in a distorted penta-gonal-bipyramidal geometry. Two carboxyl-ate O and two N atoms from the ethyl-enediaminetetra-acetate (EDTA) ion and one O atom from coordinated water comprise the equatorial plane. Two other carboxyl-ate O atoms from the EDTA ion occupy the apical sites. Both ammonium cations and all water mol-ecules function as hydrogen-bond donors, and ten N-H⋯O and nine O-H⋯O hydrogen bonds form a three-dimensional network between the complex anions, cations and the water mol-ecules.
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, People's Republic of China.
authors.forename: Hua-Ming
authors.initials: HM
authors.lastname: Huang
authors.forename: Hong-Bing
authors.initials: HB
authors.lastname: Yang
authors.forename: Xiang-Yu
authors.initials: XY
authors.lastname: Li
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Ren