Chemistry Journal of Moldova

MIXED-LIGANDS μ3-OXO TRINUCLEAR CARBOXYLATES [Fe3O(CH2BrCOO)1.5(CH2ClCOO)4.5(H2O)3]Br0.75Cl0.25 5H2O and [Fe3O(BrCH2COO)6(H2O)3] NO3⋅2.63H2O

Author(s):

Sergiu Shova, Ana Lazarescu, Maria Gdaniec, Yurii Simonov, Constantin Turta


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2008 Volume 3, no.2
Pages: 86-94
Keywords:

mixed-ligands complexes; Iron(III) carboxylates; crystal structure, magnetic properties.


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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2008.03(2).04

Graphical Abstract:
Two novel μ3-oxo-centered carboxylate-bridged triiron complexes [Fe3O(BrCH2COO)6(H2O)3] NO3·2.63H2O (1) and [Fe3O(CH2BrCOO)1.5(CH2ClCOO)4.5(H2O)3]Br0.75Cl0.25 5H2O (2) were synthesized and their structures were characterized by X-ray crystallography. The opportunity of mixed-ligand complex formation in iron(III)-bromoacetic acid system was shown. The first co-ordination sphere of the iron atom in compound 2 includes two different carboxylate anions, CH2BrCOO- and CH2ClCOO- in the capacity of syn-syn- bidentate-bridged ligands, while Br- and Cl- anions being in the ratio 1:1, formulate the external sphere of the complex. The IR spectra, thermic analysis and magnetic properties of complexes were studied.

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