Crystal complexes of the general formula [M(4-iaa)(2)(H(2)O)(2)]H(2)O have been obtained from aqueous solutions containing a double excess of the sodium salt of imidazole-4-acetic acid (Na 4-iaa . H(2)O) with respect to the nitrates of cobalt(II) and manganese(II). The complexes have been characterized by X-ray studies, electronic UV-VIS-NIR spectra, IR spectra and the complex of manganese(II) by EPR spectra. In the present complexes the imidazole-4-acetate anion is a chelating ligand where an azomethine nitrogen atom of the imidazole ring and an oxygen atom of the carboxyl group are donor atoms. The immediate environment of the central ion in both complexes is described by distorted cis-octahedron. (C) 2003 Elsevier Ltd. All rights reserved.
Crystal structure and physico-chemical properties of cobalt(II) and manganese(II) complexes with imidazole-4-acetate anion / Krystyna, Kurdziel; T., Glowiak; Materazzi, Stefano; Julia, Jezierska. - In: POLYHEDRON. - ISSN 0277-5387. - 22:23(2003), pp. 3123-3128. [10.1016/j.poly.2003.07.004]
Crystal structure and physico-chemical properties of cobalt(II) and manganese(II) complexes with imidazole-4-acetate anion
MATERAZZI, Stefano;
2003
Abstract
Crystal complexes of the general formula [M(4-iaa)(2)(H(2)O)(2)]H(2)O have been obtained from aqueous solutions containing a double excess of the sodium salt of imidazole-4-acetic acid (Na 4-iaa . H(2)O) with respect to the nitrates of cobalt(II) and manganese(II). The complexes have been characterized by X-ray studies, electronic UV-VIS-NIR spectra, IR spectra and the complex of manganese(II) by EPR spectra. In the present complexes the imidazole-4-acetate anion is a chelating ligand where an azomethine nitrogen atom of the imidazole ring and an oxygen atom of the carboxyl group are donor atoms. The immediate environment of the central ion in both complexes is described by distorted cis-octahedron. (C) 2003 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
