Synthesis and Characterization of New Nickel(II) Chelates With S-Alkyl-Salicylaldehyde Thiosemicarbazones

Abstract

The template reactions of salicylidene-, 5-bromosalicylidene-, and 3,5-dichlorosalicylidene-S-R-thiosemicarbazone (R: propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, dodecyl) with 5-bromo- and 3,5-dichlorosalicylaldehyde in the presence of nickel(II) yielded N¹,N⁴-diarylidene-S-alkyl-thiosemicarbazone chelates. The N₂O₂ type complexes were isolated as stable solid compounds and characterized by elemental analysis, electronic, infrared, ¹H NMR, and mass spectroscopies. The magnetic susceptibility measurements at room temperature (r.t.) indicate the diamagnetic nature of the complexes. The relationship between melting point (mp) values of the nickel(II) template complexes and the chain length of alkyl moiety was clearly shown.

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GRAPHICAL ABSTRACT

Keywords:

• Template reaction
• nickel(II)
• spectroscopic studies
• thiosemicarbzones

Acknowledgments

The present work was supported by the Research Fund of Istanbul University. Doctorate Project No: T-14/15122006.