Acta Crystallographica Section E (Sep 2009)

Tetraaquabis(isonicotinamide-κN1)nickel(II) bis(4-formylbenzoate) dihydrate

  • Tuncer Hökelek,
  • Filiz Yılmaz,
  • Barış Tercan,
  • Ferdi Gürgen,
  • Hacali Necefoğlu

DOI
https://doi.org/10.1107/S1600536809032279
Journal volume & issue
Vol. 65, no. 9
pp. m1101 – m1102

Abstract

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The asymmetric unit of the title complex, [Ni(C6H6N2O)2(H2O)4](C8H5O3)2·2H2O, contains one-half of the complex cation with the NiII atom located on an inversion center, a 4-formylbenzoate (FB) counter-anion and an uncoordinated water molecule. The four O atoms in the equatorial plane around the Ni atom form a slightly distorted square-planar arrangement and the slightly distorted octahedral coordination is completed by the two N atoms of the isonicotinamide (INA) ligands at a sligthly longer distance in the axial positions. The dihedral angle between the carboxylate group and the attached benzene ring is 8.14 (11)°, while the pyridine and benzene rings are oriented at a dihedral angle of 3.46 (6)°. In the crystal structure, O—H...O, N—H...O and C—H...O hydrogen bonds link the molecules into a three-dimensional network. π–π Contacts between the benzene and pyridine rings [centroid–centroid distance = 3.751 (1) Å] may further stabilize the crystal structure.