Synthesis and Characterization of Two NeW Co(II)-Quinate Complex Forms from Aqueous Solutions. Correlation with the Biological Co(II) Speciation

Melita Menelaou, A. Konstantopai, A. Salifoglou
Two new Co(II)-quinate species were synthesized in aqueous solution at the optimum pH 5. They were isolated in a pure crystalline form and were characterized by elemental analysis, spectroscopic techniques (FT-IR, UV-Vis, EPR), magnetic studies and X-ray crystallography. The two new isostructural species contain cobalt ions in an octahedral environment, and each cobalt ion coordinates with three quinic acids.
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