Abstract
Six nickel(II) complexes containing N2O2 chelating thiosemicarbazones were synthesized using N1-3/4/5-methoxysalicylidene-S-methyl/propyl thiosemicarbazones and 4-benzyloxy- salicylaldehyde in the presence of Ni(II) ion by template reaction. The structures of synthesized compounds were characterized by elemental analysis, UV-Vis, IR and 1H-NMR spectroscopies. The structures of two complexes, N1-4-methoxysalicylidene-N4-4-benzyloxysalicylidene-S-methylthiosemicarbazidato nickel(II) (3) and N1-5-methoxysalicylidene-N4-4-benzyloxysalicylidene-S-propylthiosemicarbazidato nickel(II) (6), were determined by X-ray single-crystal diffraction method. The total antioxidant capacities of thiosemicarbazones and nickel(II) complexes were evaluated by using cupric reducing antioxidant capacity (CUPRAC) method. The obtained trolox equivalent antioxidant capacity (TEAC) values of the thiosemicarbazones were higher than nickel(II) complexes. 5-methoxy substitute derivatives (L5, L6) exhibited the highest activity in thiosemicarbazone compounds. The hydroxyl radical, DPPH radical and ABTS radical scavenging ability of the compounds were also evaluated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
