Synthesis and Characterization of Homo Binuclear Complexes of UO₂(VI), Th(IV), ZrO(IV) and VO(IV) with Polyaza Macrocyclic Schiff-Bases

Anti-corrosive agents based benzil-thiocarbohydrazone macrocyclic ligand-derived Cu (II) and Zn (II) chelates: template synthesis and physically admixing with epoxy coating

“…While the IR spectrum of the complex (L-Cu) revealed a wide, medium-intensity band at 3445 cm −1 which points to the existence of an (N─H) group, the azomethine band at 1572 cm −1 was shifted to a weaker and lower intensity. This distinctly shows the coordination of the ligand via the azomethine nitrogen toward the metal ion (Chandra and Sharma, 1983; Mohapatra and Dash, 2010; Rana et al , 1982). The absorption band v(C=S) was observed at 1490 cm −1 , and the above band appears nearly at the same position as found in the free ligand, meaning non coordination of thioimide sulfur (Singh et al , 2006).…”