N—H...N, N-H...O and N-H...π_CO Hydrogen Bonding in [N,N-Bis(2-aminoethyl)-2-aminoethyl]ammonium Tetracarbonylcobaltate(1-)

In the title compound, (C₆H₁₉N₄)[Co(CO)₄], the cations are linked via N—H...N hydrogen bonds in a two-dimensional (2D) grid that takes the form of a buckled sheet. Channels between sheets are occupied by the [Co(CO)₄]⁻ anions, which are linked to the cation network via N—H...O and N—H...π_CO hydrogen bonds. Both types of cation–anion hydrogen bond are uncommon. Indeed, this is the first report of a structurally characterized N—H...π_CO hydrogen bond.

-1