Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı 2

Synthesis and Structural Characterization of Fe(III) and Ni(II) Complexes with

Substituted Thiosemicarbazone Ligand

Coordination chemistry of mixed hard-soft NS donor ligands is a field of current interest. Thiosemicarbazones that are most widely studied are sulphur and nitrogen consisting ligands. The real impetus towards coordination chemistry of thiosemicarbazones is the wide range of biological properties depending on parent aldehyde or ketone.

In this study, the six new ligands were obtained, namely 2-hydroxy-4-methoxy acetophenone S-allyl-thiosemicarbazone (1a), 2-hydroxy-4-methoxy acetophenone S-propyl-thiosemicarbazone (1b), 2-hydroxy-4-methoxybenzophenone S-allyl-thiosemicarbazone (2a), 2-hydroxy-4-methoxybenzophenone S-propyl-thiosemicarbazone (2b), 2,4-dihydroxybenzophenone S-allyl-thiosemicarbazone (3a), 2,4-dihydroxybenzophenone S-propyl-thiosemicarbazone (3b).



N₂O₂-type chelate complexes were synthesized by template synthesis of S-alkyl thiosemicarbazone derivatives with salicyl aldehyde in the presence of nickel(II) and iron (III) ions. In addition, the template reaction of nickel chloride with 2-hydroxy-4-methoxybenzophenone S-allyl-thiosemicarbazone and salicyl aldehyde resulted in formation of N₄O₂-type complex. The properties and structures of thiosemicarbazones and their complexes were investigated by elemental analyses, IR, ¹H-NMR, EI-MS ve UV-vis spectroscopies. Single crystal structure of N₄O₂-type complex were determined by using X-Ray Diffraction Method.