Synthesis and properties of a heterobimetallic iron-manganese complex and its comparison with homobimetallic analogues

Synthesis, Characterization, and Reactivity of a Series of Homo‐ and Hetero‐dinuclear Complexes based on an Asymmetric FloH Ligand System

“…For example a series of heterodimetallic Fe III M II (M = Fe, Cu, Co, Cd, and Zn) complexes in good yields have been synthesized by utilizing hard and anionic oxygen donors on one side to selectively bind the Fe III ion, and soft and neutral nitrogen donors on the other side, to preferentially bind the divalent metal ions. A few symmetric ligands have also been successfully utilized in the synthesis of heterodinuclear complexes by treating the ligands with equimolar amounts of two different metal salts; the factors that contribute to the sole formation of the heterodinuclear complexes without the contamination of the homodinuclear units are, however, not clear in these cases , . In our group we previously reported the site‐directed generation of a heterodinuclear Fe III Cu II complex 1 by using an asymmetric dinucleating ligand FloH (Scheme ) …”

“…A few symmetric ligands have also been successfully utilized in the synthesis of heterodinuclear complexes by treating the ligands with equimolar amounts of two different metal salts; [11] the factors that contribute to the sole formation of the heterodinuclear complexes without the contamination of the homodinuclear units are, however, not clear in these cases. [11,21] In our group we previously reported the site-directed generation of a heterodinuclear Fe III Cu II complex 1 by using an asymmetric dinucleating ligand FloH (Scheme 1). [2] The iron(III) ion was introduced first on the preferential metal-binding site of the ligand that leads to the formation of the thermodynamically favored five-membered chelate ring upon metal-binding.…”