Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 5 (May 2013)

metal-organic compounds

Acta Cryst. (2013). E69, m252    [ doi:10.1107/S1600536813008933 ]

catena-Poly[[[di­aqua­cobalt(II)]-bis­{[mu]-2-[3-(4-carboxyl­atophen­yl)pyridin-1-ium-1-yl]acetato}] dihydrate]

W. Gao and X.-M. Zhang

Abstract: In the title polymeric coordination compound, {[Co(C14H10NO4)2(H2O)2]·2H2O}n, the CoII ion resides on an inversion center and exhibits a distorted o­cta­hedral coordination geometry defined by four O atoms from two pairs of equivalent monodentate carboxyl­ate groups from 2-[3-(4-carboxyl­atophen­yl)pyridin-1-ium-1-yl]acetate ligands and by two O atoms from two equivalent coordinating water mol­ecules. The zwitterionic di­carboxyl­ate ligands serve as bridges with two monodentate carboxyl­ate and the metal ions are linked by double bridges, forming polymeric chains running along [01-1]. The chains are further stabilized and associated into layers parallel to (011) through intra- and inter­chain hydrogen bonding and [pi]-[pi] stacking inter­actions [inter­planar and centroid-centroid distances of 3.658 (3) Å and 3.653 (2) Å, respectively].

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