Issue 6, 2002
From the journal:

Journal of the Chemical Society, Dalton Transactions

Utilization of crown ethers to stabilize the dinuclear μ-oxo bridged iron(iii) aqua ion, [(H2O)5Fe(μ-O)Fe(OH2)5]4+†

Peter C. Junk,*a   Brian J. McCool,b   Boujemaa Moubaraki,a   Keith S. Murray,a   Leone Spiccia,a   John D. Cashionc  and  Jonathan W. Steedd  

* Corresponding authors

a School of Chemistry, Box 23, Monash University, Victoria, 3800, Australia
E-mail: peter.junk@sci.monash.edu.au

b Department of Chemistry, James Cook University, Townsville, Queensland, 4811, Australia

c School of Physics and Materials Sciences, Box 27 Monash University, Victoria, 3800, Australia

d Department of Chemistry, King's College London, Strand, London, UK

Abstract

Using a supramolecular approach a class of compounds containing the [(H2O)5Fe–O–Fe(H2O)5]4+ core, viz. [(H2O)5Fe–O–Fe(OH2)5](NO3)4·(18-crown-6)2, (1), [(H2O)5Fe–O–Fe(OH2)5](ClO4)4·(18-crown-6)2·2H2O (2) and [(H2O)5Fe–O–Fe(OH2)5](NO3)10[Fe(OH2)6]2(15-crown-5)4·(H2O)6, (3), has been prepared and characterized. These three complexes were characterized by electronic, infrared, Raman and Mössbauer spectroscopy, X-ray crystallography and magnetic susceptibility. The X-ray structures reveal the crown ethers, anions and the [(H2O)5Fe–O–Fe(H2O)5]4+ cores are all involved in extensive hydrogen bonding, thus stabilizing the unprecedented (in the solid state) dimeric cores. Magnetic susceptibility measurements show a strong antiferromagnetic coupling in each complex that is consistent with current radial and angular overlap descriptions of exchange coupling in mono-oxo bridged dinuclear Fe(III) complexes.

Graphical abstract: Utilization of crown ethers to stabilize the dinuclear μ-oxo bridged iron(iii) aqua ion, [(H2O)5Fe(μ-O)Fe(OH2)5]4+

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Article information

DOI
https://doi.org/10.1039/B105691N
Article type
Paper
Submitted
28 Jun 2001
Accepted
03 Jan 2002
First published
21 Feb 2002

J. Chem. Soc., Dalton Trans., 2002, 1024-1029

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Utilization of crown ethers to stabilize the dinuclear μ-oxo bridged iron(III) aqua ion, [(H2O)5Fe(μ-O)Fe(OH2)5]4+

P. C. Junk, B. J. McCool, B. Moubaraki, K. S. Murray, L. Spiccia, J. D. Cashion and J. W. Steed, J. Chem. Soc., Dalton Trans., 2002, 1024 DOI: 10.1039/B105691N

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