<i>Gem</i>-diol Generation in Copper and Zinc <i>N</i>-methyl-2-imidazolecarboxaldehyde Complexes: <i>Solid-state</i> NMR, EPR and Single-Crystal X-ray Studies

Resumen

Abstract Novel coordination compounds, mono- ( 1 ) and binuclear copper complexes ( 2 ) and a zinc complex ( 3 ) were synthesized and studied through single-crystal X-ray crystallography, solid-state NMR and EPR techniques to determine the chemical functionalization of the carbonyl group in N -methyl-2-imidazolecarboxaldehyde ligand. Particularly, molecules containing carbonyl groups are versatile ligands that give rise to a wide range of new materials due to the high reactivity of the carbonyl group. However, the chemical identification of the functional group present in these coordination compounds is a challenge because the copper ion affects the NMR signals. In this sense, X-ray crystallography becomes an indispensable tool for the analysis. The imidazole ligands in copper complexes 1 and 2 were found to be the aldehyde and the gem -diol forms, respectively. Furthermore, the gem -diol and carboxylate moieties were detected in the crystal lattice for the zinc complex 3 and studied by solution- and solid-state NMR.

Jonás J. Pérez Bravo

Posdoct-CONICET

He participado en el desarrollo de biomateriales aplicados a la agroindustria, compósitos nanoestructurados para fotodegradación y/o adsorción de contaminantes.

Juan Manuel Lázaro Martínez

Investigador

Dedicado a la síntesis y caracterización de nanocompuestos a base de polímeros naturales para el desarrollo de materiales inteligentes funcionales