A New Chloro‐Bridged Cu^II Schiff Base Complex with Ferromagnetic Exchange Interaction

Abstract

The synthesis and characterization of the µ-Cl-bridged dinuclear complex [CuLCl] 2 with the new Schiff-base ligand HL, 2-methyl-6-[(pyridine-2-ylmethylene)amino]phenol, is reported. The structural study shows the complex has the unusual distorted trigonal-bipyramidal geometry. Variable temperature susceptibility measurements in the range of 2.0-300 K reveal a novel ferromagnetic coupling, 2J = 1.52 cm -1 .

Copper(II) complexes with tridentate pyrazole-based ligands: synthesis, characterization, DNA cleavage activity and cytotoxicity

“…distances are comparable with those reported for other Cu(II) complexes with related tridentate ligands of the Schiff base type[20]. The Cu-Cl distances are different from one another, being the apical Cu-Cl(1) distance considerably longer than the equatorial one[2.2989(8) vs. 2.7598(8) Å] as reported for other dichloro-bridged Cu(II) complexes [20-22].…”

Synthesis, structural characterization and DNA interaction studies on a mononuclear copper complex: Nuclease activity via self-activation

“…The copper centre was 0.13 Å above the plane generated by N1, N2, N4 and Cl1. Cu-N Py distances (~2.00 Å) and Cu-N im distance~1.97 Å are consistent with the reported data [10]. The equatorial Cu-Cl bond distance (2.21 Å) is [5,11] and even shorter than the values (2.26 Å and 2.28 Å) reported [12] for the equatorial Cu-Cl bond.…”

Ferromagnetic Spin Ladder System: Stack of Chlorido‐Bridged Dinuclear Copper(II) Complexes with 2‐Methylisothiazol‐3(2H)‐one

“…Furthermore, π-π interactions between mi molecules may support the construction of the ladder, because mi has a planar five-membered ring in which the largest deviation of C (1) For the construction of the ladder, the selection of the terminal ligand L is important. For several decades, many Cu(μ-Cl) 2 Cu complexes with polydentate ligands L have been investigated; [16,18,19,34] however, there is no report of their formation as spin ladders. These results suggest that polydentate ligands tend to induce the formation of discrete Cu(μ-Cl) 2 Cu complexes.…”

“…The magnetic properties of chlorido-bridged dinuclear copper(II) complexes have been thoroughly investigated from the viewpoint of both experiment [15,16] and theory. [17][18][19][20] The results suggested that the magnitude and sign of the intramolecular magnetic exchange interaction depends not only on the angle of Cu-(μ-Cl)-Cu but also on the type of terminal ligand L. In other words, the intramolecular magnetic interactions can be governed by the nature of the terminal ligands.…”