title: Poly[[penta-aqua-bis-(μ3-hydrogen squarato)barium] monohydrate].
abstract: The crystal structure of the title compound, {[Ba(C4HO4)2(H2O)5]·H2O} n , consists of discrete double chains propagating along [010]. The chains are formed by Ba(II) ions linked by bridging hydrogen squarate ligands in a trans-bis-monodentate mode. In addition, the bridging hydrogen squarate ligands connect the chains into a ladder structure via a third coordinating O atom. The remaining coordination sites are occupied by five aqua ligands and a second mondendate hydrogen squarate ligand, forming a slightly distorted tricapped trigonal-prismatic geometry. O-H⋯O hydrogen bonds link the chains and solvent water mol-ecules into a three-dimensional network.
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine, 25000 , Algeria.
authors.forename: Chahrazed
authors.initials: C
authors.lastname: Trifa
authors.forename: Amira
authors.initials: A
authors.lastname: Bouhali
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.forename: Chaouki
authors.initials: C
authors.lastname: Boudaren
authors.forename: Hocine
authors.initials: H
authors.lastname: Merazig
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Aug 1;67(Pt 8):m1130-1
references.pmid: 22090893
references.citation: Acta Crystallogr C. 2005 Jun;61(Pt 6):m266-8
references.pmid: 15930660
references.citation: Acta Crystallogr B. 2001 Aug;57(Pt 4):591-8
references.pmid: 11468386
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Jan 29;67(Pt 2):m275-6
references.pmid: 21522923