MIXED LIGAND NICKEL(II) COMPLEXES OF BENZOYLTRIFLUOROACETONE WITH 2,2-BIPYRIDINE, 1,10-PHENANTHROLINE AND TETRAMETHYLETHYLENEDIAMINE: SYNTHESIS, SPECTROSCOPIC AND ANTIMICROBIAL PROPERTIES

Abstract

A series of nickel (II) complexes of 4,4,4-trifluoro-1-phenyl-1,3-butanedione(bta) ligand mixed with 2,2¢-bipyridine (bipy), 1,10-phenanthroline (phen), and tetramethylethylenediamine(tmen) were synthesized and characterized by elemental analysis, IR and UV-Vis spectroscopy, magnetic  and antimicrobial studies . A distorted square pyramidal nickel(II) complexes with the formular [Ni(bta)(N-N)(X)].H₂O was formed with the bta ligand, where bta coordinated with the nickel ion through the two oxygen atom, the N-N donor ligand bonding with two nitrogen atom and  the fifth coordination position occupied by the NO₃ molecule. On the other hand, the complexes; [Ni(bta)₂tmen] and [Ni(bta)(bzac)bipy].H₂O exhibited an octahedral geometry. The microbiostatic activity revealed that the [Ni(bta)(phen)(NO₃)].H₂O and [Ni(bta)(bipy)(NO₃)].H₂O lacked antibacterial activity.