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

Authors
Sowrey, FE Tilford, C Wocadlo, S Anson, CE Powell, AK Bennington, SM Montfrooij, W Jayasooriya, UA Cannon, RD
Citation
Fe. Sowrey et al., Spin frustration and concealed asymmetry: structure and magnetic spectrum of [Fe3O(O2CPh)(6)(py)(3)]ClO4 center dot py, J CHEM S DA, (6), 2001, pp. 862-866
Citations number
33
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
ISSN journal
14727773 → ACNP
Issue
6
Year of publication
2001
Pages
862 - 866
Database
ISI
SICI code
1472-7773(2001):6<862:SFACAS>2.0.ZU;2-V
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 P6(3)/m. Incoherent inelastic neutron scattering spectra at T=1.5 K however show th e presence of two inequivalent sets of molecules, one a static "isosceles" coupled system, with two J values for the three metal-metal interactions, t he other a dynamic system, with rapid pseudorotation between equivalent iso sceles geometries. Combining infrared and neutron scattering data, the dist ortion of the cluster has been estimated.