Probing electronic structures of transition metal complexes using electron paramagnetic resonance spectroscopy

. In fact, the physical principles of transition metal EPR have long been well-established and since 1970s a series of dedicated voluminous monographs have been published already. Not surprisingly, they are not appropriate stating points for novices to grasp a panorama of the profound theory prior to scrutinizing in-depth references. The present review aims to fill this gap to provide a perspective of transition metal EPR and unveil some peculiar subtleties thereof on the basis of our recent work.