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Supramolecular cobalt(II)-pyridine-2,5-dicarboxylate complexes with isonicotinamide, 2-amino-3-methylpyridine and 2-amino-6-methylpyridine: Syntheses, crystal structures, spectroscopic, thermal and antimicrobial activity studies |
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| Authors: | Alper Tolga Çolak Ferda? Çolak Demet Akduman Mehmet Tümer |
| Institution: | a Department of Chemistry, Faculty of Arts and Sciences, Dumlup?nar University, 43820 Kütahya, Turkey b Department of Biology, Faculty of Arts and Sciences, Dumlup?nar University, 43820 Kütahya, Turkey c Department of Chemistry, Faculty of Arts and Sciences, Eski?ehir Osmangazi University, 26480 Eski?ehir, Turkey d Department of Chemistry, Science Faculty, Anadolu University, 26470 Eski?ehir, Turkey e Department of Chemistry, Faculty of Arts and Sciences, K. Mara? Sütçü ?mam University, 43820 K. Mara?, Turkey |
| Abstract: | The mer-Co(pydca)(H2O)3(ina)]·H2O (1), (2a3mpyH)2Co(pydca)2(H2O)2]·2H2O (2) and (2a6mpyH)2Co(pydca)2(H2O)2]·2H2O (3) complexes (H2pydca: pyridine-2,5-dicarboxylic acid, ina: isonicotinamide, 2a3mpy = 2-amino-3-methylpyridine and 2a6mpy = 2-amino-6-methylpyridine) were synthesised and characterised by elemental analysis, magnetic and spectroscopic measurements (UV-Vis and IR spectra) and single crystal X-ray diffraction technique. The thermal behaviour of the complexes was also studied by simultaneous thermal analysis techniques (TG, DTG and DTA). In complex 1, Co(II) ion was coordinated by one bidentate pydca, one isonicotinamide and three aqua ligands to generate a CoN2O4 distorted octahedral geometry. Complexes 2 and 3 crystallise in the triclinic system and space group  and the structures consist of one complex anion Co(pydca)2(H2O)2]2−, two protonated aminomethylpyridinium cations, ampyH+ and two crystal water molecules. In the anions, the Co(II) ions have a distorted octahedral configuration and are coordinated by two bidentate pydca and two trans-aqua ligands. The pydca ligand is coordinated to the Co(II) by both the heterocyclic N atom and the adjacent carboxylate group O atom, creating a chelate ring, while protonated ampy ions behave as counter ion. |
| Keywords: | Pyridine-2 5-dicarboxylato complexes Cobalt(II) complexes Antimicrobial activity MIC Isonicotinamide complex |
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