Synthesis, Crystal Structure and Hirshfeld Surface Analysis of Tetraaquabis(isonicotinamide-Κn1) Fumarate

Abstract

The reaction of cobalt(II) with fumaric acid (H<inf>2</inf>fum) and isonicotinamide in a basic solution produces the title salt, [Co(C<inf>6</inf>H<inf>6</inf>N<inf>2</inf>O)<inf>2</inf>(H<inf>2</inf>O)<inf>4</inf>](C<inf>4</inf>H<inf>2</inf>O<inf>4</inf>). In the complex cation, the Co atom, located on an inversion centre, is coordinated by two isonicotinamide and four water molecules in a distorted N<inf>2</inf>O<inf>4</inf> octahedral geometry. The fumarate anion is located on another inversion centre and is linked to neighbouring complex cations via O-H···O and N-H···O hydrogen bonds and weak C-H···O hydrogen bonds. In the crystal, the complex cations are further linked by O-H···O, N-H···O and weak C-H···O hydrogen bonds, forming a three-dimensional supramolecular architectecture. Hirshfeld surface analyses (d<inf>norm</inf> surfaces and two-dimensional fingerprint plots) for the title compound are presented and discussed. © 2018 International Union of Crystallography. All rights reserved.