title: catena-Poly[[aqua-bis-{4-[2-(2,4-dioxopentan-3-yl-idene)hydrazin-1-yl]benzo-ato-κO}copper(II)]-μ-N,N-diethyl-pyridine-3-carboxamide-κN:O].
abstract: The Cu(II) atom in the title compound, [Cu(C(12)H(11)N(2)O(4))(2)(C(10)H(14)N(2)O)(H(2)O)](n), lies in a square plane defined by the O atoms of the carboxyl-ate ions, the N atom of the N-heterocycle and the water mol-ecule. Coordination by an amido O atom of an adjacent N-heterocycle in the apical direction leads to a polymeric chain running along [01[Formula: see text]]. The chain motif is consolidated by hydrogen bonds involving the water mol-ecule; the water mol-ecule is a hydrogen-bond donor to the free carbonyl atoms of the carboxyl-ate ions. Intra-molecular N-H⋯O hydrogen bonds also occur.
authors.forename: Abel M
authors.initials: AM
authors.lastname: Maharramov
authors.forename: Vusala I
authors.initials: VI
authors.lastname: Mardanova
authors.forename: Famil M
authors.initials: FM
authors.lastname: Chyraqov
authors.forename: Atash V
authors.initials: AV
authors.lastname: Gurbanov
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng