Synthesis, structural characterisation and magnetic studies of polymetallic iron phosphonate cages

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Abstract

Four new polymetallic iron(III) phosphonate cages have been made and structurally characterised. These are an octanuclear cage [Fe8O 3(OH)2(O2CtBu) 11(PhCH2PO3)3(py)3], a decanuclear cage [Fe10O2(OH)8(O 2CtBu)10(PhCH2PO3) 4(pip)2], a heterometallic cage [Fe6Li 5(μ3-O)2(tBuPO3) 6(O2CtBu)8(MeOH)2(Py) 4] and a tridecanuclear cage [Et3NH]2[Fe 13(μ3-O)3(μ2-OH) 7(tBuPO3)7(Me3CCO 2)14(H2O)] (pip = piperidine, py = pyridine). Magnetic studies of the first three compounds show anti-ferromagnetic exchange between the iron(III) centers leading to diamagnetic ground states for the homometallic cages. For the heterometallic cage, the six Fe(III) centers are arranged in two triangles, and each triangle has an S = 1/2 spin ground state. © The Royal Society of Chemistry 2009.

Bibliographical metadata

Original languageEnglish
Pages (from-to)6166-6174
Number of pages8
JournalDalton Transactions
Issue number31
DOIs
Publication statusPublished - 2009

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