Crystal structure of catena-poly[[[aqua­bis­(di­methyl­formamide-κO)magnesium(II)]-μ(3)-(2,2′-bi­pyridine-5,5′-di­carboxyl­ato-κ(5) O (2):O (2′):N,N′:O (5))-[di­chlorido­platinum(II)]] di­methyl­formamide monosolvate]

The title compound, {[MgPtCl(2)(C(12)H(6)N(2)O(4))(C(3)H(7)NO)(2)(H(2)O)]·C(3)H(7)NO}(n), is a one-dimensional coordination polymer. The structure consists of Pt-functionalized bi­pyridine ligands connected by Mg(II) cations, as well as coordinating and non-coordinating solvent mol­ecules. The Pt(II) cation is coordinated by the two N atoms of the bi­pyridine moiety and two Cl atoms in a square-planar fashion. This coordination induces an in-plane bend along the bi­pyridine backbone of approximately 10° from the linear ideal of a conjugated π-system. Likewise, the coordination to the Mg(II) cation induces a significant bowing of the plane of the bi­pyridine of about 12°, giving it a distinct curved appearance. The carboxyl­ate groups of the bi­pyridine ligand exhibit moderate rotations relative to their parent pyridine rings. The Mg(II) cation has a fairly regular octa­hedral coordination polyhedron, in which three vertices are occupied by O atoms from the carboxyl­ate groups of three different bi­pyridine ligands. The remaining three vertices are occupied by the O atoms of two di­methyl­formamide (DMF) mol­ecules and one water mol­ecule. The one-dimensional chains are oriented in the [01-1] direction, and non-coordinating DMF mol­ecules can be found in the space between the chains. The shortest inter­molecular O⋯H contacts are 2.844 (4) and 2.659 (4) Å, suggesting moderate hydrogen-bonding inter­actions. In addition, there is a short inter­molecular Pt⋯Pt contact of 3.491 (1) Å, indicating a Pt stacking inter­action. Some structure-directing contribution from the hydrogen bonding and Pt⋯Pt inter­action is probable. However, the crystal packing seems to be directed primarily by van der Waals inter­actions.