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Synthesis, crystal structure, and properties of a μ3-oxo-trichromium(III) propionate cluster with pyrazole

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A new μ3-oxo trinuclear chromium(III) propionate cluster, [Cr33-O)(O2CCH2CH3)6(pyr)3]NO3·0.25(H2O) (1), has been synthesized by reaction of a μ3-oxo trinuclear chromium(III) propionate precursor [Cr33-O)(O2CCH2CH3)6(H2O)3]NO3 with a pyrazol ligand (pyr) and characterized by IR spectroscopy, single-crystal X-ray structure determination, and thermal analysis. Magnetic susceptibility and magnetization studies revealed antiferromagnetic exchange interactions within the trinuclear Cr(III) cluster (J = −11.9 cm−1) and determined the electronic ground state (S = ½) of the compound.
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Keywords: Chromium(III); carboxylate ligand; cluster compound; magnetic properties

Document Type: Research Article

Affiliations: 1: Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova 2: Departement für Chemie und Biochemie, Universität Bern, Bern, Switzerland

Publication date: January 2, 2016

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