title: Discrete tetrairon(III) cluster exhibiting a square-planar Fe4(mu4-O) core: structural and magnetic properties.
abstract: The aerobic reaction of the Schiff-base ligand N-(benzimidazol-2-yl)salicylaldimine (Hbisi) with iron(II) perchlorate in methanol leads to the formation of the remarkable coordination compound [Fe(4)(mu(4)-O)(mu-MeO)(4)(bisi)(4)](ClO(4))(2) x 4 MeOH (1), whose single-crystal X-ray structure reveals the presence of a discrete Fe(III)(4)(mu(4)-O) core. Magnetic and Mossbauer studies both show that the exchange interaction within the square tetranuclear iron(III) unit is dominated by the central bridging mu(4)-oxido ligand, the involvement of the mu-methoxido bridges being negligible.
authors.affiliation: Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.
authors.forename: Mariappan
authors.initials: M
authors.lastname: Murali
authors.forename: Sanjit
authors.initials: S
authors.lastname: Nayak
authors.forename: José
authors.initials: J
authors.lastname: Sánchez Costa
authors.forename: Joan
authors.initials: J
authors.lastname: Ribas
authors.forename: Ilpo
authors.initials: I
authors.lastname: Mutikainen
authors.forename: Urho
authors.initials: U
authors.lastname: Turpeinen
authors.forename: Martin
authors.initials: M
authors.lastname: Clémancey
authors.forename: Ricardo
authors.initials: R
authors.lastname: Garcia-Serres
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Latour
authors.forename: Patrick
authors.initials: P
authors.lastname: Gamez
authors.forename: Geneviève
authors.initials: G
authors.lastname: Blondin
authors.forename: Jan
authors.initials: J
authors.lastname: Reedijk
mesh_terms: D018360:Crystallography, X-Ray; D004583:Electrons; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D008958:Models, Molecular; D008968:Molecular Conformation; D010100:Oxygen / Q000737:chemistry*; D015204:Spectroscopy, Mossbauer
chemical_list: D007501:Iron; D010100:Oxygen