Spin frustration and concealed asymmetry: structure and magnetic spectrum of [Fe3O(O2CPh)6(py)3]ClO4·py

Frank E. Sowrey; Claire Tilford; Sigrid Wocadlo; Christopher E. Anson; Annie K. Powell; Stephen M. Bennington; Wouter Montfrooij; Upali A. Jayasooriya; Roderick D. Cannon

doi:10.1039/B008121N

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Spin frustration and concealed asymmetry: structure and magnetic spectrum of [Fe₃O(O₂CPh)₆(py)₃]ClO₄·py†

Frank E. Sowrey,‡*^a Claire Tilford,^a Sigrid Wocadlo,^a Christopher E. Anson,^a Annie K. Powell,^a Stephen M. Bennington,^b Wouter Montfrooij,^b Upali A. Jayasooriya^a and Roderick D. Cannon^a

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* Corresponding authors

^a School of Chemical Sciences, University of East Anglia, Norwich, UK

^b Rutherford Appleton Laboratory, Chilton, UK

Abstract

The oxo-centred trinuclear complex [Fe₃O(O₂CPh)₆(py)₃]ClO₄·py and its fully deuteriated analogue have been synthesized. X-Ray crystallography at T = 233 K shows that the complex has threefold symmetry, space group P6₃/m. Incoherent inelastic neutron scattering spectra at T = 1.5 K however show the presence of two inequivalent sets of molecules, one a static “isosceles” coupled system, with two J values for the three metal–metal interactions, the other a dynamic system, with rapid pseudorotation between equivalent isosceles geometries. Combining infrared and neutron scattering data, the distortion of the cluster has been estimated.

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DOI: https://doi.org/10.1039/B008121N
Article type: Paper
Submitted: 09 Oct 2000
Accepted: 18 Jan 2001
First published: 19 Feb 2001

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J. Chem. Soc., Dalton Trans., 2001, 862-866

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Spin frustration and concealed asymmetry: structure and magnetic spectrum of [Fe₃O(O₂CPh)₆(py)₃]ClO₄·py

F. E. Sowrey, C. Tilford, S. Wocadlo, C. E. Anson, A. K. Powell, S. M. Bennington, W. Montfrooij, U. A. Jayasooriya and R. D. Cannon, J. Chem. Soc., Dalton Trans., 2001, 862 DOI: 10.1039/B008121N

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Journal of the Chemical Society, Dalton Transactions