New dinuclear MII-LnIII complexes of general formulas [Cu(µ-L)(µ-OAc)Ln(NO3)2]·CH3CN·H2O (LnIII = Gd (1), Tb (2), Dy (3) and Er (4)), [Ni(CH3CN)(µ-L)(µ-OAc)Ln(NO3)2]·CH3CN Nd (5), (6), (7), (8), (9) Y (10)) [Co(CH3CN)(µ-L)(µ-OAc)Ln(NO3)2]·CH3CN (11), (12), (13), (14) (15)) were prepared from the compartmental ligand N,N?-dimethyl-N,N?-bis(2-hydroxy-3-formyl-5-bromo-benzyl)ethylenediamine (H2L)....