Chemistry Journal of Moldova

CARBOXYLATE SUBSTITUTION PATTERN AS STRUCTURAL DIRECTIVE FOR THE FINAL PRODUCTS: SYNTHESIS, STRUCTURE AND PROPERTIES OF [Fe4Ca2O2(μ2-HCCl2COO)10(μ3-HCCl2COO)2(THF)6]

Author(s):

Denis Prodius, Valeriu Mereacre, Maria Gdaniec, Sergiu Shova, Yurii A. Simonov, Nicolae Stanica, Ion Geru, Andrea Caneschi, Constantin Turta


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2008 Volume 3, no.2
Pages: 81-85
Keywords:

Iron(III) calcium(II) heterocluster; crystal structure; antiferromagnetic interaction.


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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2008.03(2).06

Graphical Abstract:
 A novel hexanuclear iron-calcium-oxo complex has been synthesized and characterized by different physico-chemical methods and X-ray single crystal structural analysis: [Fe4Ca2O2(μ2-HCCl2COO)10(μ3-HCCl2COO)2(THF)6].The molecular structure shows that there are two types of coordination for COO- anions: bidentate and tridentate.The corresponding variable temperature susceptibility measurement shows that in the complex there exists an antiferromagnetic interaction (|J12| = |J34| = -71.86 cm-1). The iron(III) high spin state (5/2) is proved by Mössbauer spectroscopy. High magnetic EPR measurements of 1 indicates the presence of S=0 ground state with low-lying S=1 excited state centred around g = 2.0054 ±0.0001.

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