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 SM ISO690:2012PRODIUS, Denis, MERIAKRE, V., GDANIEC, Maria, SHOVA, Sergiu, SIMONOV, Yurii A., STANICA, Nicolae, GERU, Ion, CANESCHI, Andrea, TURTA, Constantin. Carboxylate substitution pattern as structural directive for the final products: synthesis, structure and properties of [Fe4Ca2O2(μ2-HCCl2COO)10(μ3-HCCl2COO)2(THF)6]. In: Chemistry Journal of Moldova, 2008, nr. 2(3), pp. 81-85. ISSN 1857-1727. |
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| Chemistry Journal of Moldova | ||||||
| Numărul 2(3) / 2008 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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| Pag. 81-85 | ||||||
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A novel hexanuclear iron-calcium-oxo complex has been synthesized and characterized by different physicochemical 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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| Cuvinte-cheie Iron(III) calcium(II) heterocluster; crystal structure; antiferromagnetic interaction |
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