Crystal Structure and Magnetic Properties of a Binuclear Copper(II) Complex Bridged by an Alkoxo-oxygen Atom and an Acetate Ion

Abstract

Dinuclear Copper(II) Complex, Super-exchange Interactions, Antiferromagnetic Coupling [Cu4(L)2(02CMe)2] H20 (L = l,3-bis(5-bromo-2-hydroxybenzylidene)propan-2-ol) was synthesized and its crystal structure determined. (C38HuN4 0 ioBr4Cu4) H2 0 , monoclinic, space group P2,/c, a = 21.072(5), b = 9.673(2), c = 21.934(4) Ä, ß = 109.73(2)°, V = 4208(2) A3, Z = 4. The crystal structure consists of two independent binuclear copper(II) complexes and the non-coordinating water molecule in the asymetric unit. The Cu(II) ions are in a square-planar geometry and coordinated by donor atoms of the ligand (NO3).The average Cu -Cu distance and average Cu-O-Cu angle are 3.491(2) A and 132.0(1)°, respectively. Temperature-dependent magnetic susceptibility measurements of the complex show an intramolecular anti ferromagnetic coupling in the dimeric Cu(II) core. The fitting parameters are -2J = 174.4 cm-1, g = 1.98.

Molecular structure and density functional modelling studies of 2-[(E)-2-(4-hydroxyphenyl)ethyliminomethyl]phenol

“…The appearance of these forms in 2-hydroxy salicylaldimines separately or jointly depends on the media as well as stereochemistry of the compounds and the N-substituents which provide different electron-donating or withdrawing systems [15,16]. Therefore, it has a crucial importance to investigate 2-hydroxy salicylaldimine Schiff bases by considering [4,[16][17][18][19][20]. In the present work, the 2-[(E)-2-(4-hydroxyphenyl)ethyliminomethyl]phenol, consisting salicylaldehyde and tyramine, which is a naturally occurring monoamine compound and trace amine derived from the amino acid tyrosine [21] has been prepared and studied by experimental (MS, FT-IR, NMR and X-ray diffraction) and computational [density functional theory (DFT)] methods from the point of the tautomerism in solution and the solid state.…”