Høgni Weihe and Hans U. Güdel
Angular and Distance Dependence of the Magnetic Properties of Oxo-Bridged Iron(III) Dimers
J. Am. Chem. Soc. 119, 6539-6543 (1997)                 

Abstract: The magnetic properties of oxo-bridged oxo-(carboxylato)-bridged and oxo-bis(carboxylato)-bridged iron(III) dimers are found to depend on the iron-(m-O) distance as well as on the iron-(m-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 s donor properties of oxide as a ligand into the ss and ps contributions.