title: Magnesium and nickel(II) furan-2,5-dicarboxylate.
abstract: The salts hexaaquamagnesium furan-2,5-dicarboxylate, [Mg(H(2)O)(6)](C(6)H(2)O(5)), (I), and hexaaquanickel furan-2,5-dicarboxylate, [Ni(H(2)O)(6)](C(6)H(2)O(5)), (II), provide the first crystallographic characterization of the furan-2,5-dicarboxylate dianion. Both structures exhibit extensive three-dimensional hydrogen-bonding networks between the octahedral coordinated hexaaquametal(II) ions and the dicarboxylate anions. Although the two structures are not isomorphous, they contain essentially identical two-dimensional slabs. The distinction between the structures is that these slabs are related by translation in (II), whereas adjacent slabs in (I) are reflected relative to each other by the action of a glide plane. The reflection occurs so that the local contacts between slabs are not changed, and thus the hydrogen-bond networks are identical except for the orientation of the water molecules at the interface between slabs.
authors: Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark. magnus@kiku.dk
authors: Magnus
authors: M
authors: Schau-Magnussen
authors: Yury Y
authors: YY
authors: Gorbanev
authors: Søren
authors: S
authors: Kegnæs
authors: Anders
authors: A
authors: Riisager
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007477:Ions / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; D009942:Organometallic Compounds; C569582:copper(II)furan-2,5-dicarboxylate; C569581:nickel(II)furan-2,5-dicarboxylate; D003300:Copper