A terephthalato-bridged Ni^II complex capped with a nonchelating ligand displays a three-dimensional supramolecular network constructed by coordination and multi-intermolecular forces

A new tp-bridged complex [Ni(pyrazole)₄(tp)]_n (1; tp = terephthalate) coordinated with a nonchelating pyrazole ligand has been synthesized and characterized using X-ray structure determination and magnetic studies. The crystal structure reveals that the capping ligand functions as a source of hydrogen bonding and intermolecular contacts, such as π-π and CH-π interactions, that result in a three-dimensional supramolecular assembly. Weak antiferromagnetic couplings are transmitted between Ni ^II centers through the tp linkage.