An attempt at the interpretation of the ligand hyperfine structure in the epr-spectra of mox -ions

A simple model is proposed for the observed ligand hyperfine structure in complexes of the type MOF52- (where M is Cr, Mo, W). It is assumed that contact interaction and dipole-dipole interaction between the unpaired electron and the ligands are the origin of this ligand hyperfine structure. An est. is made for the energies assocd. with certain orientations of an external magnetic field with respect to the axes of symmetry of the complex mol. A remarkable resemblance exists between a spectrum based on these assumptions and the spectrum of a frozen soln. of CrOF52- in 38% HF measured at the X band. [on SciFinder (R)]