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Synthesis and Characterization of New Transition Metal Complexes of Schiff-base Derived from 2-Aminopyrimidine and 2,4-Dihydroxybenzaldehyde and Its Applications in Corrosion Inhibition

“…In complexes, this band is shifted to higher frequencies, indicating the coordination of H2apdhba through the deprotonated phenolic (C2-O -). 24 These data has been further supported by the disappearance of the broad band at 3387 cm -1 attributed to ν (2-OH); the deprotonation occurs prior to coordination. The band at 3217 cm -1 in the H2apdhba due to ν (4-OH) stretch is unaffected by coordination.…”

“…3 In the IR spectra of the complexes, this band is shifted to the region at 1605 -1612 cm -1 . 3,23 An intense band at 1229 cm -1 in the free H2apdhba has been assigned to the phenolic ν (C-O) stretch. In complexes, this band is shifted to higher frequencies, indicating the coordination of H2apdhba through the deprotonated phenolic (C2-O -).…”

Synthesis, Potentiometric, Spectral Characterization and Microbial Studies of Transition Metal Complexes with Tridentate Ligand

“…40 The biological activity of free ligand is enhanced in presence of the metal. 41 This is a consequence of the increased lipid solubility of the metal complex as compared to the parent ligand. Transport of both metal and ligand across lipophilic membranes to vital intramolecular sites is favored by chelation.…”

An efficient three component one-pot synthesis of some new octahydroquinazolinone derivatives and investigation of their antimicrobial activities

“…The in vitro antimicrobial activity of compounds 5a-p were carried out against 24 hr old cultures of three bacteria Escherichia coli as Gram-negative bacteria and Bacillus substilis and Staphylococcus aureus as Gram-positive bacteria and two fungi Aspergillus niger and Rhizopus oryzae by disc-diffusion method [31][32] .…”