Study of a series of cobalt(II) sulfonamide complexes: Synthesis, spectroscopic characterization, and microbiological evaluation against M. tuberculosis. Crystal structure of [Co( sulfamethoxazole)(2)(H2O)(2)]center dot H2O

作者：Mondelli Melina; Pavan Fernando; de Souza Paula C; Leite Clarice Q; Ellena Javier; Nascimento Otaciro R; Facchin Gianella; Torre Maria H^*

来源：Journal of Molecular Structure, 2013, 1036: 180-187.

DOI：10.1016/j.molstruc.2012.09.064

• Cobalt complexes
• Sulfonamides
• Antimycobacteria activity
• X-ray structure
• IR spectra
• EPR

Nowadays, the research for new and better antimicrobial compounds is an important field due to the increase of immunocompromised patients, the use of invasive medical procedures and extensive surgeries, among others, that can affect the incidence of infections. Another big problem associated is the occurrence of drug-resistant microbial strains that impels a ceaseless search for new antimicrobial agents.
In this context, a series of heterocyclic-sulfonamide complexes with Co(II) was synthesized and characterized with the aim of obtaining new antimicrobial compounds. The structural characterization was performed using different spectroscopic methods (UV-Vis, IR, and EPR). In spite of the fact that the general stoichiometry for all the complexes was Co(sulfonamide)(2)center dot nH(2)O, the coordination atoms were different depending on the coordinated sulfonamide. The crystal structure of [Co(sulfamethoxazole)(2)(H2O)(2)]center dot H2O was obtained by X-ray diffraction showing that Co(II) is in a slightly tetragonal distorted octahedron where sulfamethoxazole molecules act as a head-to-tail bridges between two cobalt atoms, forming polymeric chains.
Besides, the activity against Mycobacterium tuberculosis, one of the responsible for tuberculosis, and the cytotoxicity on J774A.1 macrophage cells were evaluated.

• 出版日期2013-3-27