Two-step construction of molecular and polymeric mixed-metal Cu(Co)/Be complexes employing functionality of a pyridyl substituted acetylacetonate

Abstract

The bifunctional exodentate ligand 3-(4-pyridyl)-2,4-pentanedione was exploited for the synthesis of mixed-metal (Co/Be and Cu/Be) and mixed-metal mixed-valence (Cu^ICu¹¹/Be) coordination compounds. The ligand was immobilized on a tetrahedral Be²⁺ matrix employing the β-diketonate function and the resulting complex BeL₂ was used as an extended connector for generation of Co(Cu)/Be alternating superstructures utilizing the pyridyl donor sites. Coordination compounds adopt either molecular (Co{BeL₂}₂Cl₂), and one- (Cu₂X₃{BeL₂}₂; X = Cl, Br) or two-dimensional (Co{BeL₂}(CH₃OH)₂SO₄, Cu₂Br₂{BeL₂}₂) polymeric patterns.