An iron(III) complex salt containing pyrazole as both ligand and counter-ion: bis­(1H-pyrazol-2-ium) penta­cyanido(1H-pyrazole-κN²)ferrate(III)

In a complex salt composed of an [Fe(CN)₅(pyrazole)]²⁻ dianion and two 1H-pyrazol-2-ium cations, the dianion is a mononuclear cluster in which the Fe^III cation is coordinated by five cyanide ligands and by one of the N atoms of a pyrazole ligand. A three-dimensional supra­molecular network is formed through a rich scheme of N—H...N hydrogen bonds and C—H...π inter­actions among the cations and anions.

An organic-inorganic hybrid compound containing imidazolium cations and a one-dimensional lithium hexa­cyanido­cobaltate-based anionic framework

In an organic-inorganic hybrid compound, neighbouring [Co(CN)₆]^3- anionic units are linked by Li⁺ cations through the cyanide groups in a trans mode, forming a one-dimensional zigzag chain structure extending along the c axis. A three-dimensional supra­molecular network is formed through hydrogen-bonding inter­actions and is further stabilized by weak CN...[pi] inter­actions between the cyanide groups and the imidazolium cations.