Electrochemical synthesis and structural studies of zinc(II) complexes with derivatives of benzo[b]furancarboxylic acids

[Display omitted] •New Zn(II) complexes with benzo[b]furancarboxylic acids are structurally studied.•Metal–ligand interactions are investigated by X-ray absorption spectroscopy.•In all complexes Zn(II) is pentacoordinated by anionic ligands and water molecules. Three novel zinc complexes with benzo[...

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Published in:Chemical physics letters 2013-06, Vol.575, p.40-45
Main Authors: Drzewiecka, Aleksandra, Koziol, Anna E., Klepka, Marcin T., Wolska, Anna, Jimenez-Pulido, Sonia B., Struga, Marta
Format: Article
Language:English
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Summary:[Display omitted] •New Zn(II) complexes with benzo[b]furancarboxylic acids are structurally studied.•Metal–ligand interactions are investigated by X-ray absorption spectroscopy.•In all complexes Zn(II) is pentacoordinated by anionic ligands and water molecules. Three novel zinc complexes with benzo[b]furan-carboxylic acids were obtained. The elemental and thermal analyses, and IR spectroscopy were used for basic characterization of compounds. The Zn(II) coordination geometry was studied by X-ray absorption spectroscopy. In microcrystalline powders for all complexes the cation is penta-coordinated (ZnO5) with the Zn–O distances equal to ca. 2Å, as determined by extended X-ray absorption fine structure. For recrystallized Zn(II) complex 1 (with 7-acetyl-6-methoxy-3-methyl-benzo[b]furan-2-carboxylic acid) crystal structure was determined by X-ray crystallography, and this analysis indicated a distorted polyhedron around the cation in which one of the Zn–O distances is above 2.5Å.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2013.04.078