Abstract
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.
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