Synthesis, crystal structure and Hirshfeld surface analysis of tetraaquabis(isonicotinamide-κN1)cobalt(II) succinate

Abstract

The reaction of CoCl2 with succinic acid and isonicotinamide in basic solution produces the title complex [Co(C6H6N2O)2(H2O)4](C4H4O4). The cobalt(II) ion of the complex cation and the succinate anion are each located on an inversion centre. The CoII ion is octahedrally coordinated by four O atoms of water molecules and two N atoms of isonicotinamide molecules. The two ions are linked via Owater—H...Osuccinate hydrogen bonds, forming chains propagating along [001]. In the crystal, these hydrogen-bonded chains are linked into a three-dimensional framework by further O—H...O hydrogen bonds and N—H...O hydrogen bonds. The framework is reinforced by C—H...O hydrogen bonds. Hirshfeld surface analysis and two-dimensional fingerprint plots have been used to analyse the intermolecular interactions present in the crystal.

Keywords

• crystal structure
• succinic acid
• isonicotinamide
• cobalt(II)
• Hirshfeld surfaces
• hydrogen bonding