Structure and antimicrobial activity of some new azopyrazolone chelates of Ni(II) and Cu(II) acetates, sulfates, and nitrates

Versatile ligational behavior of azopyrazolone derived from hydralazine

“…The ligational behavior of LH has not been reported yet and hence its complexes with Cr(III), Fe(III), Ni(II), and Cu(II) have been synthesized and characterized in the present investigation. Pyrazolones and their complexes exhibit antimicrobial [2] properties. Therefore, the antifungal studies of the compounds against Aspergillus niger are also conducted.…”

Selective and Effective Bactericidal Activity of the Cobalt (II) Cation against Helicobacter pylori

“…Thus the highly regulated metal cation homeostasis of H. pylori, aimed at fulfilling its need for high levels of nickel ions without reaching toxic levels, could be exploited to develop a novel antibacterial therapy. Indeed, transition metal cations, although widely present in enzymes, can be used as bacterial inhibitors depending upon their chemical speciation [14,15]. For example, the most common metal coenzyme, zinc, is also the most commonly used metal‐based antibacterial.…”

Co(II), Ni(II), Cu(II), and Cd(II) Complexes of Some New Arylazopyrazolopyrimidine Derivatives

“…The strong band appearing in the IR spectrum of the free ligands L 1 , L 2 and L 3 at 1440, 1440 and 1430 cm -1 , respectively, is due to the azo group stretching vibration n(N=N). [23,24] This band is found at lower frequencies in the IR spectra of the metal complexes indicating the participation of the azo group in complex formation. Furthermore, the band of medium intensity occurring at 1170, 1180, and 1180 cm -1 in the spectra of the ligands L 1 , L 2 and L 3 , respectively, is assignable to the Ar-N=N stretching vibration.…”