Structural study of Cu(II) complexes with benzo[ b ]furancarboxylic acids

• DOI: 10.1016/j.nimb.2017.02.031
• Publication Date: 2017-03-03T19:15:24Z
• Authors: Diana Kalinowska; Marcin T. Klepka; Anna Wolska; Aleksandra Drzewi...; Kinga Ostrowska; Marta Struga
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract Four Cu(II) complexes with 2- and 3-benzo[ b ]furancarboxylic acids have been synthesized and characterized using combination of two spectroscopic techniques. These techniques were: ( i ) FTIR and ( ii ) XAFS. FTIR analysis confirmed that complexes were formed and gave insight into identification of possible coordinating groups to the metallic center. XANES analysis indicated that the oxidation state of Cu is +2. EXAFS analysis allowed to identify that the first coordination sphere is formed by 4–5 oxygen atoms with the Cu–O distances around 2 A. Combining these techniques it was possible to structurally describe novel Cu(II) complexes with benzo[ b ]furancarboxylic acids.