%0 Journal Article
%T Bis(dimethylmalonato-¦Ê2O,O¡ä)bis[4-(4-pyridylamino-¦ÊN4)pyridinium]nickel(II) hexahydrate
%A Gregory A. Farnum
%A Robert L. LaDuca
%J Acta Crystallographica Section E
%D 2008
%I International Union of Crystallography
%R 10.1107/s160053680803835x
%X In the title compound, [Ni(C5H6O4)2(C10H10N3)2]¡¤6H2O, divalent nickel ions situated on the crystallographic twofold axis are octahedrally coordinated by four O atoms from two dimethylmalonate ligands in a 1,3-chelating mode and two N atoms from two protonated monodentate 4,4¡ä-dipyridylamine molecules. The molecules link into chains via N¡ªH...O hydrogen bonding mediated by protonated pyridyl groups. The chains form layer patterns via ¦Ð¨C¦Ð stacking [centroid¨Ccentroid distance = 3.777 (2)  ] . Water molecule hexamers are generated from the unligated water molecules (three per asymmetric unit) by inversion centers at Wyckoff position d. These clusters are situated between the pseudolayers, providing hydrogen-bonding pathways that build up the three-dimensional structure.
%U http://scripts.iucr.org/cgi-bin/paper?S160053680803835X