title: Poly[[di-μ-aqua-(μ-4-formyl-2-meth-oxy-phenol-ato)disodium] 4-formyl-2-meth-oxy-phenolate].
abstract: In the title coordination polymer, {[Na(2)(C(8)H(7)O(3))(H(2)O)(4)](C(8)H(7)O(3))}(n), all the non-H atoms except the water O atoms lie on a crystallographic mirror plane. One sodium cation is bonded to four water O atoms and one vanillinate O atom in a distorted square-based pyramidal arrangement; the other Na(+) ion is six-coordinated by four water O atoms and two vanillinate O atoms in an irregular geometry. One of the vanillinate anions is directly bonded to two sodium ions, whilst the other only inter-acts with the polymeric network by way of hydrogen bonds. In the crystal, a two-dimensional polymeric array is formed; this is reinforced by O-H⋯O hydrogen bonds, which generate R(2) (1)(6) and R(2) (2)(20) loops.
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Asghar
authors.forename: Onur
authors.initials: O
authors.lastname: Sahin
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Arshad
authors.forename: Uzma
authors.initials: U
authors.lastname: Mazhar
authors.forename: Islam Ullah
authors.initials: IU
authors.lastname: Khan
authors.forename: Orhan
authors.initials: O
authors.lastname: Büyükgüngör