Acta Cryst. (2008). E64, m1312-m1313  [ doi:10.1107/S160053680802984X ]

A novel double-chain silver(I) coordination polymer: catena-poly[[[-aqua-aquadisilver(I)]-bis(₃-5-methylpyrazine-2-carboxylato)] dihydrate]

B. Zhai, X. Zhang and M. Xu

Abstract: In the title silver(I) coordination polymer, {[Ag₂(C₆H₅N₂O₂)₂(H₂O)₂]·2H₂O}_n, the [Ag₂(₂-H₂O)(H₂O)] cores are extended by antiparallel 5-methylpyrazine-2-carboxylate (L) ligands, forming a novel double-chain structure. Both Ag⁺ cations show a distorted square-pyramidal coordination. Ag1 is bonded to two water molecules, one L N atom, one N atom and one carboxylate O atom from a neighbouring L, whereas Ag2 is surrounded by two L N atoms, two L carboxylate O atoms and one bridging water molecule. O-HO hydrogen-bonding interactions involving water clusters and carboxylate O atoms link the molecules into a three-dimensional supramolecular architecture, which is further consolidated by weak C-HO interactions and - stacking interactions [centroid-centroid distance 3.643 (5) Å].

Online 24 September 2008

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