Mixed Ligand Complexes of Nickel (II) Dialkyldithiophosphates with 2-Acetylpyridine Semicarbazone and 2-Acetylpyridine Benzoylhydrazone

Abstract

Dialkyldithiophosphates nickel (II) complexes react with Apsc and HApBH to yield mixed ligand complexes of the types [Ni{(RO) 2 PS 2 } 2 (Apsc)] and [Ni {(RO) 2 PS 2 }(ApBH)] where R = methyl, ethyl, or propyl; Apsc = 2-Acetylpyridine semicarbazone; HApBH = 2-Acetylpyridine benzoylhydrazone. From the elemental analysis and UV, IR, and mass spectra the composition and structures of the complexes and the ligand (HApBH) were determined. TG and DTG techniques were used to investigate the thermal behavior of HApBH and the complexes. The IR spectra show that Apsc acts in a neutral bidentate fashion and HApBH behaves in all cases as a mononegative tridentate ligand. The electronic spectral data suggest an octahedral structure of these complexes. Also the biological activity for some of the complexes and HApBH was recorded against some bacteria and fungi. The HApBH ligand has a high toxicity against bacteria and fungi under study; this may be due to presence of the pyridyl ring and hydroxyl group of the compound.

Keywords:

• 2-Acetylpyridine Benzoylhydrazone
• 2-acetylpyridine Semicarbazone
• Mixed Ligand Complexes
• Nickel (II) Dialkyldithiophosphates
• Spectroscopic Characterization
• Thermal Analysis