David's Investigation of air-stable dinuclear complexes of four-coordinate Zn(II) and Ni(II) ions with a radical bridge has just been published in Inorg. Chem.

Tetrahedral transition metal complexes can be envisioned for future magnetic applications. Especially dimeric species with a bridging radical ligand are expected to show exceptional properties. In this regard, the zero-field splitting and the exchange interaction in such systems is of great interest. In this work, two air-stable, dinuclear Ni(II) and Zn(II) complexes were examined with respect to their metal-radical exchange interactions as well as their spin properties by a combination of (HF)EPR spectroscopy, magnetometry and ab-initio calculations.