Synthesis and Characterization of Lanthanide(III) Complexes Withsalicylidene-2-Aminopyridine

Synthesis, characterization and biological aspects of novel five-coordinated dimeric-Cu(II) systems

“…which shifted to higher frequency at 1612 cm 21 [38,39] in the complexes indicating the bidentate NZN coordination of the ligand. Similarly for benzylidene-2-aminopyridine two strong bands were assigned at 1615 and 1593 cm 21 for the n (CvN) stretching vibration of the azomethine and pyridine ring respectively which on complexation are shifted to 1666 cm 21 and 1620 cm 21 , respectively, suggesting the bidentate NZN participation in coordination [40]. The n (CvN) in the spectra of the complex indicating the participation of the sulfur atom of the thiophene ring.…”

Trinuclear and mononuclear nickel(II) complexes incorporating tridentate 2-[(pyridine-2-ylimine)methyl]phenol ligand: Syntheses, crystal structures and magnetic properties

“…Three complexes [Ni 3 (pymp) 4 (pya) 2 ](NO 3 ) 2 (CH 3 OH) 2 (1), [Ni 3 (pymp) 4 -(pya) 2 ]Cl 2 (CH 3 OH) 2 (2) and [Ni(pymp) 2 (py) 2 ] (3) (pya = pyridin-2-amine and py = pyridine) were synthesized [28][29][30]. Although Hpymp based metal complexes have been studied [31][32][33][34][35][36] and bonding modes I, II and III between metal and donor atoms are very common (Scheme 2), the binding modes IV and V ((3. 221) and (2.…”

Synthesis, Spectral Characterization, and Antibacterial Activity of Some New Azomethine-Metal Complexes Derived from Vanillin

“…The data is summarized in Table 3. The data indicates that the energy of the d-d transitions in the complexes is slightly less when compared to the corresponding aqua ions, either because of slight covalent interaction of the 3d vacant orbital with ligands, leading to some delocalization with consequent reduction in interelectronic repulsion [16], or by increased nuclear shielding of the orbital due to slight covalent ligandmetal electron drift. The * transitions occur at 290 nm for the ligand, but on complexation with the different metal ions like copper and cobalt, new bands appeared at 328nm, 336nm respectively corresponding to the intra ligand transition and a charge transfer from the ligand to the different metal ions are observed [17].…”