Synthesis, spectral identification, electrochemical behavior and theoretical investigation of new zinc complexes of bis((E) 3-(2-nitrophenyl)-2-propenal)propane-1,2-diimine

Synthesis, spectral, thermal behaviors, and antimicrobial studies of some nanostructure five coordinated Hg(II) complexes

“…An IR spectral comparison between the free ligand and its mercury complexes shows some changes in position of peaks. The spectrum of the free Schiff base ligand showed the peak of azomethine group (-CH=N) at 1635 cm -1 , which is shifted to lower wavenumbers at 1629-1633 cm -1 in the mercury complexes, that this shift confirms the involvement of ligand azomethine nitrogen in linkage to mercury ion [23][24][25][26][27][28]31]. The weak bands appearing at wavenumbers of 3056, 3025, 2925, and 2834 cm -1 in free ligand are assigned to stretching vibrations of aromatic, olefinic, aliphatic, and iminic C-H linkages, respectively, that shift to other wavenumbers after coordination to mercury center.…”

“…In this work, in continuation of our previous reports [23][24][25][26][27][28], the synthesis and characterization of some new mercury(II) complexes of a tridentate Schiff base ligand entitled as (3-phenyl-allylidene)-[2-(2-styryl-imidazolidin-1-yl)-ethyl]-amine is described. The prepared compounds have been characterized by UV-visible, FTIR, 1 H-NMR and 13 C-NMR spectra.…”

Metal Complexes of Schiff Bases Derived from 2-Thiophenecarboxaldehyde and Mono/Diamine as the Antibacterial Agents

“…The peak between 1620 and 1580 cm -1 have been assigned to υ C=N band [8]. This band shows a downward shift by about 25-35 cm -1 in the spectra of all the metal complexes, indicating the participation of the azomethine nitrogen in coordination with metals [5,8,9]. Upon comparison, it was determined that the υ(C=N) stretching vibration is found in the free ligands at 1604 and 1633 cm −1 for the LH and L 1 ligands, respectively.…”

“…The shifted band in many cases is coincident with the C=C band, which then shows greater intensity or broadening. The υ C=N modes are often mixed with higher frequency υ C=C (near 1600 cm -1 ) and are seen as a strong band [5,9]. The bands appearing at 1315-1400 cm -1 (specially the highest frequency ones near 1400 cm -1 ) have been assigned to υ C-N mode [8,9].…”

“…Synthesis, spectroscopic and electrochemical properties of some complexes of a new symmetric bidentate Schiff base ligand of bis ((3-(2-nitrophenyl) allylidene) propane-1,2-diamine (L) with a general formula of MLX 2 (M= Cd(II) and Hg(II); X= Cl-, Br-, I-, SCN-and NO 3 -) are reported [5]. Several new dioxouranium(VI) complexes of Schiff bases, derived from salicylaldehyde, substituted salicylaldehydes, 2-hydroxy-1-naphthaldehyde and 2-aminothiophenol, have been prepared and characterized on the basis of their elemental analyses, IR and electronic absorption spectra and magnetic susceptibility measurements.…”