Synthesis and characterization of bivalent metal complexes of a tetradentate N6 macrocyclic ligand

Thermal and Microbicidal Study of Coordination Polymers: Transition Metal with 8HQMIT Ligand

“…The spectral bands are well within the range observed for hexacoordinate octahedral complexes reported earlier. [25,26] The Cu +2 complexes exhibit normal magnetic moments 1.98 B.M. corresponding to one unpaired electron indicating the distorted octahedral geometry, which is in agreement with data reported by other research worker.…”

Synthesis, Spectroscopic Studies and Antifungal Activity of 2‐[(4(3‐Chlorophenyl) piperazine‐1‐yl)methyl]‐3‐[8‐hydroxy quinolin‐5‐yl]‐3(H)‐quinazolin‐4‐one Ligand and its Chelates

“…The υ 2 /υ 1 ratio for the chelate is 1.63 occurs in the usual range (1.60-1.82) for octahedral Ni(II) chelates 17 . The spectral bands are well within the range observed for hexacoordinate octahedral complexes reported earlier 18 .…”

Antibacterial and antifungal studies of macrocyclic complexes of trivalent transition metal ions with their spectroscopic approach

“…Further, no strong absorption band was observed near 1715 cm −1 , indicating the absence of the >C=O group of the glyoxal moiety. The disappearance of these bands and the appearance of a new, strong absorption band near 1590-1629 cm −1 confirmed condensation of the carbonyl group of glyoxal and the amino group of diaminonaphthalene and the formation of a macrocyclic Schiff base 30 , as these bands may be ascribed to the (C=N) stretching vibrations 31,32 . The lower value of the (C=N) stretching vibrations may be explained on the basis of drift of the lone pair density of the azomethine nitrogen toward the metal atom 33,34 , indicating that coordination takes place through the nitrogen of the C=N group.…”