Synthesis, characterization, and antipathogenic studies of some transition metal complexes with N,O-chelating Schiff’s base ligand incorporating azo and sulfonamide Moieties

Synthesis, structural characterization, in vitro antimicrobial and anticancer activity studies of ternary metal complexes containing glycine amino acid and the anti-inflammatory drug lornoxicam

“…5 T 1g transition appears to be split into two bands at 16,635 and 12,850, and 15,888 and 13,242 cm À1 for Fe(II) and Fe(III) complexes, respectively. The observed magnetic moment value of Fe(III) and Fe(II) complexes are found to be 5.83 and 5.42 B.M., respectively, indicating octahedral geometry involving d 2 sp 3 hybridization in Fe(III) and Fe(II) ions [23][24][25][26]. The spectra show also a band at 20,870 and 21,400 cm À1 which may be attributed to ligand to metal charge transfer for Fe(II) and Fe(III) complexes, respectively.…”

“…The Ni(II) complex reported herein is high spin with room temperature magnetic moment value of 3.12 B.M. indicating that the Ni(II) complex is octahedral [23][24][25]. The diffused reflectance spectrum displays three bands atˆ1: (13,412) cm À1 : 3 A 2g ?…”

“…4 A 2g (F) and 4 T 1g (F) ? 4 T 2g (P) transitions, respectively, suggesting that there is an octahedral geometry around Co(II) ion [23][24][25][26]. The magnetic moment value is found to be 5.40 B.M.…”

An azo-azomethine ligand and its copper(II) complex: Synthesis, X-ray crystal structure, spectral, thermal, electrochemical and photoluminescence properties

“…The tautomerism of azomethines received considerable interest due to application of improved experimental and theoretical methods. Recently, some azo-azomethines and their metal chelates have been reported [36][37][38][39]. In our previous work, 4-[(E)-phenyldiazenyl]-2-[(E)-(phenylimino)methyl]phenol and 2-{(E)-[(2-hydroxy-5-methylphenyl)imino]methyl}-4-[(E)-phenyldiazenyl]phenol compounds were synthesized and structurally characterized [40,41].…”

Ternary metal complexes of guaifenesin drug: Synthesis, spectroscopic characterization and in vitro anticancer activity of the metal complexes

“…is an indicative of octahedral geometry.The diffused reflectance spectrum of Ni(II) ternary complex exhibits transition bands at 27,173, 19,704 and 12,562 cm -1 : indicating that the Ni(II) complex is octahedral. The diffused reflectance spectrum displays three bands at ν 1 : (12,562) cm -1 : 3 A 2g (F) → 3 T 1g (F), ν 2 :(19,704) cm -1 : 3 T 1g (P) → 3 A 2g and ν 3 : (27,173) cm -1 : ligand to metal charge transfer[25,30,31]. The ligand field parameter ∆ o (splitting parameter), B` (Racah parameter of interelectronic ratio) for the nickel(II) complex is calculated.…”