Synthesis and Characterization of N‐(o‐Vanillinidene)‐p‐anisidine and N,N′‐bis(o‐Vanillinidene)ethylenediamine and Their Metal Complexes

Co (II) and Zn (II) Metal Complexes of Heterocyclic Schiff Bases: A Synthesis, Spectral and Antimicrobial Study

“…This observed peak is because of metal to ligand charge transfer spectra. The values are in agreement with octahedral geometry of these complexes 17,18,19 .…”

Synthesis, Spectral and Biocidal Screening of Schiff Base Complexes of Co(II), Ni(II) and Cu(II) Containing Nitrogen and Sulphur Donor atoms

“…In spectra of all the complexes, this band without change in position and intensity, clearly indicates noninvolvement of nitrogen atom of either amino of imino group in coordination with metal ion. A broad and sharp band was obtained at 1470 cm -1 in the ligand assignable 17,19,20 to ν C=N vibration. This band has been reduced by 20-30 cm -1 in the complexes suggesting coordination of azomethine N with metal ion.…”

“…The IR spectrum shows a sharp and strong band at 3400 cm -1 assignable 17,19 to ν N-H vibration. In spectra of all the complexes, this band without change in position and intensity, clearly indicates noninvolvement of nitrogen atom of either amino of imino group in coordination with metal ion.…”

Synthesis and Characterization of Homo Binuclear Macrocyclic Complexes of UO2(VI), Th(IV), ZrO(IV) and VO(IV) with Schiff-Bases Derived from Ethylene diamine/Orthophenylene Diamine, Benzilmonohydrazone and Acetyl Acetone

“…The IR spectra of the ligand show strong bands appearing at 1590 and ~1070 cm -1 assignable to azomethine νC=N and νN-N. The position of former band at comparatively lower frequency region than usual free νC=N value 21 and that of later band at comparatively higher frequency region than that of free N-N 22 leads us to suggest that azomethine nitrogen atom has taken part in complexation as evidenced from the appearance of band in the regioñ 480 cm -1 due to ν(M-N). 23 The occurrence of N-N band at higher frequency in the IR spectra of the complex is due to reduction of the repulsion between the loan pair of nitrogen atoms as a result of coordination via azomethine nitrogen atoms.…”