New metal complexes with diclofenac containing 2-pyridineethanol or 2-pyridinepropanol: Synthesis, structural, spectroscopic, thermal properties, catechol oxidase and carbonic anhydrase activities

Complexes 1 , 3 and 4 have also been characterized by X-ray single crystal structural analysis. The compounds of Co(II) and Ni(II) have octahedral geometry with two diclofenac and two 2-pyridineethanol ligands in the coordination sphere.

The compounds of Cu(II) have square-pyramidal geometry and Cu(II) ions are linked via oxygens to the bridging 2-pyridineethanol or 2-pyridinepropanol ligands. The Δ ν values acquired by FT-IR are in agreement with the single XRD data. Studies on the thermal properties are reported and the complexes are stable to 196, 216, 215 and 201°C in air, respectively.