JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 63 No 2 (2018): Journal of the Chilean Chemical Society
Original Research Papers

MAGNETIC ANALYSIS OF TWO [COBALT- IMIDAZOLE-CARBOXYLATE] COMPLEXES: ORBITAL CONTRIBUTION

Ramon Arrué
Universidad de Concepción, Facultad de Ciencias Químicas, Departamento de Química Analítica e Inorgánica Universidad Santo Tomás, Departamento de Ciencias Básicas
Dominique Toledo
Universidad de Concepción, Facultad de Ciencias Químicas, Departamento de Química Analítica e Inorgánica
Octavio Peña
Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes-1
Jean-Yves Pivan
Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes-1 École Nationale Supérieure de Chimie de Rennes
Mario Reis
Instituto de Física, Universidade Federal Fluminense
Yanko Moreno
Universidad Andrés Bello, Departamento de Cs. Químicas, Facultad de Cs. Exactas
Published June 25, 2018
How to Cite
Arrué, R., Toledo, D., Peña, O., Pivan, J.-Y., Reis, M., & Moreno, Y. (2018). MAGNETIC ANALYSIS OF TWO [COBALT- IMIDAZOLE-CARBOXYLATE] COMPLEXES: ORBITAL CONTRIBUTION. Journal of the Chilean Chemical Society, 63(2). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/686

Abstract

Two coordination complexes, Co(HIMC)2(H2O)2 (1) and Co(H2IMDC)2(H2O)2 (2), were synthesized by mixing the complex precursor Cobalt(II) hexafluoroacetylacetonate (Co(hfacac)2) with 1H-imidazole-4-carboxylic acid (H2IMC) and 1H-imidazole-4,5-imidazoledicarboxylic acid (H3IMDC) ligands.

These compounds have been isolated as neutral, air and thermal stable solid and have been characterized by FT-IR and powder X-Ray diffraction analysis. The thermal stability and magnetic properties were studied in the solid state.

Compounds (1) and (2) are mononuclear complexes, where the cobalt ions adopt an distorted octahedral geometry. At low temperature they exhibit a weak antiferromagnetic interaction. The contribution of the angular momentum to the magnetic moment as well as intermolecular interactions were taken into consideration for the quantitative modeling of their magnetic properties.

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