ANGULAR AND DISTANCE DEPENDENCE OF THE MAGNETIC PROPERTIES OF OXO-BRIDGED IRON(III) DIMERS

The magnetic properties of oxo-bridged oxo-(carboxylato)-bridged and oxo-bis(carboxylato)-bridged iron(III) dimers are found to depend on the iron−(μ-O) distance as well as on the iron−(μ-O)−iron angle. With an angular and radial overlap model we account for both these dependencies. The use of an angular overlap model allows us to separate the σ donor properties of oxide as a ligand into the sσ and pσ contributions.