A Direct Three-Component Reaction for the Isolation of a Nonanuclear Iron(III) Phosphonate

Journal article

The synthesis, structure, and magnetism of a nonanuclear iron(III) phosphonate, [Fe9III(μ3-O)4(O3PC5H9)3(O2CCMe3)13]·(EtOH)0.5·(Et2O)0.5 (1), is described. Compound 1 was obtained in the direct reaction of anhydrous ferric chloride, cyclopentylphosphonic acid, and pivalic acid in the presence of triethylamine. Compound 1 possesses a distorted icosahedral structure; nine of the vertices are occupied by FeIII, whereas three others are occupied by the phosphorus atoms of the cyclopentylphosphonate ligand. Mössbauer spectroscopy of 1 confirms the presence of high-spin FeIII. Low-temperature magnetic studies reveal the presence of strong antiferromagnetic coupling between the Fe3+ ions. © 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.

Authors: Goura, J; Liu, J; Goddard, P; Chandrasekhar, V

• Publication status: Published
• Journal: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
• Issue: 26
• Pages: 4342-4348
• Publication date: 2014-09-01
• DOI: 10.1002/ejic.201402371
• EISSN: 1099-0682
• ISSN: 1434-1948
• Language: English
• Keywords: Cage compunds; Moessbauer spectroscopy; Iron; Magnetic properties; Phosphonates