IN VITRO CYTOTOXICITY AND FREE RADICAL SCAVENGING POTENTIAL OF ETHYL PYRUVATE DERIVED COPPER COMPLEXES OF THIOSEMICARBAZONE

Objective: The present study was aimed to evaluate the cytotoxicity and antioxidant properties of copper complexes of thiosemicarbazone (TSC-Cu) using different in vitro models.Methods: In vitro MTT assay was carried out against the HL-60 cell line to check the cytotoxic potency of TSC-Cu. In vitro radical scavenging activity of TSC-Cu was evaluated by checking its role in scavenging DPPH, hydroxyl radical and lipid peroxidation.Results: Among the test molecules studied, TSC-Cu with choride side chain (TSC-Cu-Cl) showed dose and time dependent increased cytotoxic activity on HL-60 cell line compared to TSC-Cu with hydroxyl side chain (TSC-Cu-OH). Further, TSC-Cu-Cl exhibited promising radical scavenging activities against hydroxyl radical, 2,2-diphenyl, 2-picryl hydrazyl (DPPH), and also effectively inhibited lipid peroxidation.Conclusion: The results of the present investigation confirm that the TSC-Cu-Cl complex can be considered as a novel metal complex with potent anti-oxidant and cytotoxic ability.Â

{N-[(2-Oxido-1-naphth­yl)methyl­idene]­serinato-κ3 O,N,O′}(1,10-phenanthroline-κ2 N,N′)copper(II)

In the title complex, [Cu(C14H11NO4)(C12H8N2)], the tridentate Schiff base ligand is derived from the condensation of 2-hydr­oxy-1-naphthaldehyde and l-serine. The CuII atom is five-coordinated by one N atom and two O atoms from the Schiff base ligand and by two N atoms from a 1,10-phenanthroline ligand in a distorted square-pyramidal geometry. In the crystal structure, the combination of inter­molecular O—H⋯O and C—H⋯O hydrogen bonds results in a two-dimensional network structure parallel to (001)

with 3-substituted-4-amino-5-mercapto-1,2,4-triazole Schiff

Thermokinetic and spectral studies of niobium(V) complexe

Crystal structure of 3-acetylcoumarin-o-aminobenzoylhydrazone and synthesis, spectral and thermal studies of its transition metal complexes

Transition metal [Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II)] complexes of a new Schiff base, 3-acetylcoumarin-o-aminobenzoylhydrazone were synthesized and characterized by elemental analyses, magnetic moments, conductivity measurements, spectral [Electronic, IR, H-1 and C-13 NMR, EPR] and thermal studies. The ligand crystallizes in the monoclinic system, space group P2(1)/n with a = 9.201(5), b = 16.596( 9), c = 11.517(6) angstrom, beta= 101.388(9)degrees, V = 1724.2 (17) angstrom(3) and Z = 4. Conductivity measurements indicated Mn(II) and Co(II) complexes to be 1 : 1 electrolytes whereas Ni(II), Cu(II), Zn(II) and Cd(II) complexes are non-electrolytes. Electronic spectra reveal that all the complexes possess four-coordinate geometry around the metal

Transition metal complexes with a new tridentate ligand, 5-[6-(5-mercapto-1,3,4-oxadiazol-2-yl)pyridin-2-yl]-1,3,4-oxadiazole-2-thiol

A new ligand 5-[6-(5-mercapto-1,3,4-oxadiazol-2-yl)pyridin-2-yl]-1,3,4-oxadiazole-2-thiol (L) and its Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes were synthesized. The authenticity of the ligand and its transition metal complexes were established by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR, 1H- and 13C-NMR, electronic, mass, ESR) and thermal studies. The IR and 1H-NMR spectral studies revealed the existence of the ligand in the thiol form in the solid state, whereas in the thione form in the dissolved state. The magnetic and electronic spectral studies suggest an octahedral geometry for all the complexes. The ligand acts as a tridentate ligand coordinating through the pyridine nitrogen and the nitrogen atoms (N-3' and N-3'') of the two oxadiazole rings. Antimicrobial screening of the ligand and its metal complexes were determined against the bacteria Escherichia coli and Bacillus cirroflagellosus, as well as against the fungi, Aspergillus niger and Candida albicans