Novel CrIII dinuclear complexes supported by salicyloylhydrazono dithiolane and dithiane ligands: Synthesis, stability, crystal structures and magnetic properties
Résumé We report the synthesis and molecular solid-state structures of five novel CoII and CoIII mononuclear complexes supported by the 2-salicyloylhydrazono-1,3-dithiolane (L1) and 2-salicyloylhydrazono-1,3-dithiane (L2) ligands. Moreover, one novel diamagnetic μ-oxo dinuclear CoIII complex [CoIII2(HL)4(μ-O)2] supported by the ligand L1 was stabilized and characterized. Crystal structure of the supporting ligand L2 was also determined.
Novel CrIII dinuclear complexes supported by salicyloylhydrazono dithiolane and dithiane ligands: Synthesis, stability, crystal structures and magnetic properties
We hereby report the synthesis, crystal structures and magnetic characterizations of three novel CrIII complexes: a mononuclear CrIII(HL(1))3 species along with two dinuclear μ-methoxo CrIII2(μ-OMe)2(HL)4 (H2L(1): 2-salicyloylhydrazono-1,3-dithiolane; H2L(2): 2-salicyloylhydrazono-1,3-dithiane). EPR studies indicate that both dinuclear complexes (2a and 2b) are stable in solution (CHCl3). Both CrIII dinuclear complexes exhibit a strong antiferromagnetic coupling. DFT calculations performed for complex 2a are in agreement with a strong antiferromagnetic exchange interaction in these new dinuclear CrIII complexes.