Acyclic and Macrocyclic Polypyrazoles: Coordination Chemistry

We demonstrate that macrocyclic pyrazolic compounds are expected to form stable complexes both with transition and alkali metals while acyclic pyrazole compounds containing one two three or four pyrazole rings only form complexes with transition metal cations. They do not complex alkali metal cations at all. This serves to emphasise the novel peculiarity of the ligands containing linked pyrazole groups.