title: Tetra-aqua-bis-(2-{[5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl]sulfan-yl}acetato)-iron(II).
abstract: In the title compound, [Fe(C(9)H(6)N(3)O(3)S)(2)(H(2)O)(4)] or [Fe(POA)(2)(H(2)O)(4)], the Fe(II) atom is located on an inversion center and is ligated by four O atoms of coordinated water mol-ecules in the equatorial plane while two POA ligands acting as monodentate ligands occupy the axial positions through their pyridyl N atoms, completing a slightly distorted octa-hedral coordination geometry. A three-dimensional supra-molecular network is formed by multiple O-H⋯O hydrogen-bonding inter-actions between the coordinated water donors and the uncoordinated carboxyl acceptors.
authors: Department of Environmental and Municipal Engineering, North China University of Water Conservancy and Electric Power, Zhengzhou, 450011,  People's Republic of China.
authors: Hai-Rong
authors: HR
authors: Wang
authors: Guo-Ting
authors: GT
authors: Li