Coordination polymers based on 1,1′-cobaltocenium dicarboxylate linkers

Abstract

With 1,1′-cobaltocenium dicarboxylate as a cobalt-containing linker, heteronuclear coordination polymers ²_∞[M(ccdc)₂] (M²⁺ = Zn²⁺, Cd²⁺, Cu²⁺; ccdc⁻ = 1,1′-cobaltocenium dicarboxylate) are generated. These compounds exhibit symmetry related structures with their structural details depending on the preferred coordination sphere of the respective metal ion. The structural relationships between these two-dimensional coordination polymers and the dependence on type and quantity of cocrystallized solvent molecules are discussed in this article. In the presence of 4,4′-bipyridine (bipy) as a co-linker, metal acetates and Hccdc/(H₂ccdc)PF₆ form the three-dimensional framework ³_∞[Zn(ccdc)(bipy)]PF₆ and the two-dimensional networks ²_∞[Zn(ccdc)(bipy)]PF₆ and ²_∞[Cu(ccdc)(bipy)]PF₆.