Two New Trinuclear MII ( M = Mn, Co) Complexes Based on 2,4-Dichlorobenzoic Acid: Synthesis, Structures and Magnetic Properties.

Two new isostructural complexes, [Mn3(L)6(bipy)2] ( 1) and [Co3(L)6(bipy)2] ( 2) (L = 2,4-dichlorobenzoate, bipy = 2, 2′-bipyridine) were synthesized under the hydrothermal conditions and characterized by single-crystal X-ray diffraction, IR spectroscopy, EA (elemental analysis), and magnetic measurements. The two complexes are found to contain a trinuclear ( M3) unit that opens up a possibility of being magnetic materials. The magnetic measurements reveal that 1 exhibits the antiferromagnetic exchange interaction between metal ions and 2 presents a weak ferromagnetic interactions between the CoII ions. [ABSTRACT FROM AUTHOR]