1 Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria.
2 Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale (CHEMS), Université Constantine 1, Constantine 25000, Algeria; Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
3 National Taras Shevchenko University of Kyiv, Department of Chemistry, Volodymyrska str. 64, 01601 Kiev, Ukraine; SciMax LLC, 2 Marshala Yakubovskogo str. 03191, Kyiv, Ukraine.
4 Department of General and Inorganic Chemistry, National Technical University of Ukraine, 'Kyiv Polytechnic Institute', 37 Prospect Peremogy, 03056 Kiev, Ukraine.
5 Laboratory of Solid State Chemistry and Mössbauer Spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montréal, Québec, H3G 1M8, Canada.

Crystal structure of poly[di-aqua-(µ-2-carb-oxy-acetato-?(3) O,O':O'')(2-carb-oxy-acetato-?O)di-µ-chlorido-dicobalt(II)].

Acta Crystallogr E Crystallogr Commun. 2016 Jan 01;72(Pt 1):21-4

Authors: Bouaoud Y, Setifi Z, Buvailo A, Potaskalov VA, Merazig H, Dénés G

Abstract

The asymmetric unit of the title polymer, [Co2(C3H3O4)2Cl2(H2O)2] n , comprises one Co(II) atom, one water mol-ecule, one singly deprotonated malonic acid mol-ecule (HMal(-); systematic name 2-carb-oxy-acetate) and one Cl(-) anion. The Co(II) atom is octa-hedrally coordinated by the O atom of a water mol-ecule, by one terminally bound carboxyl-ate O atom of an HMal(-) anion and by two O atoms of a chelating HMal(-) anion, as well as by two Cl(-) anions. The Cl(-) anions bridge two Co(II) atoms, forming a centrosymmetric Co2Cl2 core. Each malonate ligand is involved in the formation of six-membered chelate rings involving one Co(II) atom of the dinuclear unit and at the same time is coordinating to another Co(II) atom of a neighbouring dinuclear unit in a bridging mode. The combination of chelating and bridging coordination modes leads to the formation of a two-dimensional coordination polymer extending parallel to (001). Within a layer, O-Hwater?Cl and O-Hwater?O hydrogen bonds are present. Adjacent layers are linked through O-H?O=C hydrogen bonds involving the carb-oxy-lic acid OH and carbonyl groups.

PMID: 26870577 [PubMed]