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Recently we have shown that reaction of copper(II) acetate with pyrrolidines 3 (HL 1 ) and 4 (HL 2 ) leads to the formation of the 2D-coordination polymer 1 and the helical 1 D-polymer 2. Ligands of semicorrin type 9 (HL 3-5 ) exhibit similar structural motives compared with the tridentate pyrrolidine ligands 3 and 4. Reaction of semicorrin 9a (HL 3 ) with Co(II) acetate yields the mononuclear chelate complex 10a (CoL 3  2 ), whereas in the presence of oxygen the formation of the oxidation product 14 [CoL 3  2 (OAc)] is observed. The chiral semicorrin ligands 9b, c (HL 4 , HL 5 ) react with metal(II) acetates to give the complexes 10b,c-13b,c via diastereospecific complexation. The structures of the cobalt complexes have been established by single-crystal X-ray diffraction.

Synthese, Reaktivität und Struktur von Semicorrinatcobalt-Komplexen [1] / Synthesis, Reactivity and Structure of Cobalt Semicorrinate Complexes [1]