TetraAquaBis(Isonicotinamide-Κn 1)Nickel(II) Bis(4-FormylBenzoate) Dihydrate
Date
2009Author
Hökelek, Tuncer
Yilmaz , F.
Tercan , B.
Gürgen , F.
Necefoglu , H.
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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.
URI
https://doi.org/10.1107/S1600536809032279https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2970033/
http://hdl.handle.net/11655/18603