| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
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 SM ISO690:2012TUNA, Floriana, PATRON, Luminiţa A., LAZARESKU, Ana, ANDRUH, Marius. Trinuclear cobalt(II) and binuclear iron(III) complexes with unsymmetrical tetradentate schiff-base ligands derived from 3-formylsalicylic acid: Synthesis, magnetic, spectroscopic and mössbauer investigations. In: Revue Roumaine de Chimie, 2000, vol. 45, pp. 795-800. ISSN 0035-3930. |
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  Revue Roumaine de Chimie |
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| Volumul 45 / 2000 / ISSN 0035-3930 | |
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| Pag. 795-800 | |
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Two Schiff bases, 3-((N-2-carboxyphenyl)formimidoyl)salicylic acid, H3fsaamb, and 3-((N-2-carboxy-ethyl)formiṁidoyl)salicylic acid, H3fsaala, which are obtained by condensation of 3-formylsalicylic acid with 2-aminobenzoic acid and β-alanine, respectively, are used as ligands for the design of homotrinuclear metal(II) and homodinuclear metal(III) complexes. The metal centers are bridged by carboxylic and/or phenolic oxygen atoms. Three new compounds, [Co3(fsaamb)2(H2O)6], [Co3(fsaala)2(H2O)6], and [Fe2(fsaamb)2(H2O)2], have been synthesized by reacting the above ligands with the appropriate metal perchlorates in slightly basic solutions. The IR spectra show that the ligands act in a tetradentate manner, coordinating through the imino, phenolato and the two carboxylato groups. The stereochemistry of the metal ions in the three compounds is assigned according to the magnetic and UV/VIS spectroscopic data. The Fe(III) derivative has been also characterized by Mössbauer spectroscopy (δ = 0.67 mm s-1 and ΔEq = 0.94 mm s-1 at 300 K; δ = 0.77 mm s-1 and ΔEq = 0.93 mm s-1 at 80 K). |
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