Discrete tetrairon(III) cluster exhibiting a square-planar Fe4(mu4-O) core: structural and magnetic properties.

Mariappan Murali (1) , Sanjit Nayak (1) , José Sánchez Costa (2) , Joan Ribas (3) , Ilpo Mutikainen (4) , Urho Turpeinen (4) , Martin Clémancey (5) , Ricardo Garcia-Serres (5) , Jean-Marc Latour (5) , Patrick Gamez (1) , Geneviève Blondin (5) , Jan Reedijk (1)

1 Leiden Institute of Chemistry
2 Departament de Quimica Inorganica
3 Departament de Quimica Inorganica
4 Laboratory of Inorganic Chemistry
5 LCBM - UMR 5249 - Laboratoire de Chimie et Biologie des Métaux

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.

Domaines: Chimie de coordination

Mariappan Murali, Sanjit Nayak, José Sánchez Costa, Joan Ribas, Ilpo Mutikainen, et al.. Discrete tetrairon(III) cluster exhibiting a square-planar Fe4(mu4-O) core: structural and magnetic properties.. Inorganic Chemistry, 2010, 49 (5), pp.2427-34. ⟨10.1021/ic902360x⟩. ⟨hal-01069693⟩