Complexes of a novel multinucleating poly-β-diketonate ligand

The synthesis of the new polynucleating ligand 1,3-bis-(3-oxo-3-(2-hydroxyphenyl)-propionyl)-benzene (H4L) is reported along with the preparation, structure and properties of its dinuclear complexes [Cu-2(H2L)(2)(py)(2)] (1), [Ni-2(H2L)(2)(py)(4)] (2), [Mn-2(H2L)(2)(dmf)(4)] (3), [Co-2(H2L)(2)(dmf)(4)] (4) and [Co-2(H2L)(2)(MeOH)(4)] (5), respectively. In complexes 1 to 5, the polydentate ligand is in its bis-deprotonated form, chelating the metals through its beta-diketonate moieties. Magnetic measurements show that the metals within these molecules are maintained almost mutually independent.