Cobalt(II) and iron(III) complexes with 2-substituted benzimidazole derivatives |
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Authors: | M Luisa Marcos J Arturo García-Vázquez José R Masaguer Cristina Molleda |
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Institution: | (1) Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain;(2) E.U.I.T. Forestal, Universidad Politécnica, 28040 Madrid, Spain |
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Abstract: | Summary FeCl3 and the primary amines 2-aminobenzimidazole (abi) and 2(2 -aminophenyl)benzimidazole (apbi) give complexes for which spectroscopic and magnetic data suggest a pentacoordinate FeCl4].The reactions of complexes of primary amines of CoCl2 and FeCl3 with the carbonyl compounds acetylacetone (Hacac) and pyridylcarbaldehyde (pyc) yield complexes which contain the Schiff bases from the condensation of the amines and the carbonyl groups.Analytical data indicate formulae CoCl2(abiacac)2], CoCl2(abipyc)], FeCl3(abiacac)], FeCl3(abipyc)2] and FeCl3(apbipyc)] for the complexes. The cobalt(II) complexes are pseudo-tetrahedral, while the iron complexes are tetra-, penta-, or hexa-coordinate, as deduced from spectroscopic and magnetic measurements. |
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