title: Tetra-aqua-bis-[2-(2-nitro-phen-yl)acetato-κO]cobalt(II).
abstract: The mol-ecule of the title compound, [Co(C8H6NO4)2(H2O)4], is centrosymmetric. It is a cobalt(II) complex, bearing two (2-nitro-phen-yl)acetate and four aqua ligands. The coordination around the Co(II) atom is distorted octa-hedral, defined by four O atoms of water mol-ecules in the equatorial plane and by two carboxyl-ate O atoms at axial positions. The dihedral angles between the benzene ring and the acetate and nitro groups are 61.90 (10) and 19.21 (11)°, respectively. The water mol-ecules form O-H⋯O hydrogen bonds with the nitro and carboxyl-ate groups, leading to a layered structural arrangement parallel to (001).
authors.affiliation: Department of Chemistry, Institute of Chemical and Biological Sciences, University of Gujrat, Gujrat 50700, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Danish
authors.affiliation: Department of Physics, University of Sargodha, Sargodha, Punjab, Pakistan.
authors.forename: Muhammad Nawaz
authors.initials: MN
authors.lastname: Tahir
authors.affiliation: Department of Chemistry, Institute of Chemical and Biological Sciences, University of Gujrat, Gujrat 50700, Pakistan.
authors.forename: Sana
authors.initials: S
authors.lastname: Iftikhar
authors.affiliation: Department of Chemistry, Institute of Chemical and Biological Sciences, University of Gujrat, Gujrat 50700, Pakistan.
authors.forename: Muhammad Asam
authors.initials: MA
authors.lastname: Raza
authors.affiliation: Department of Chemistry, Institute of Chemical and Biological Sciences, University of Gujrat, Gujrat 50700, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Ashfaq
keywords: cobalt(II) complex; crystal structure; hydrogen bonding
references.citation: Acta Crystallogr C. 2003 Apr;59(Pt 4):M118-20
references.pmid: 12682386
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970