Heterospin 2p–4f and 2p–3d–4f complexes constructed by a nitronyl nitroxide ligand: syntheses, structures and magnetic properties

Two novel 2p–4f cyclic dimer complexes are presented. By introducing Cu(hfac) 2 , one 2p–3d–4f compound involving a {[Cu–radical] + } n cation chain and [Tb(hfac) 4 ] − anion is obtained, which exhibits slow magnetization relaxation.