Abstract
Nickel(II) complex of 4,4,4-trifluoro-1-(2-Naphthyl)-1,3-butanedione(tfnb) and its 2,2′-bipyridine (bipy), ethylenediamine (en) and 1,10-phenanthroline (phen) adducts were synthesized and characterized by elemental analysis, infrared, electronic spectral, magnetic susceptibility measurements and antimicrobial activities. Three other nickel(II) compounds were synthesized along with these compounds. The bands in the 1651-1513 cm-1 have been assigned as ν(C=O) + ν(C=C). The infrared and electronic spectral measurements are indicative of a probable six-coordinate octahedral geometry for all the nickel(II) complexes and adducts. The antimicrobial activity shows that [Ni(tfnb)2]2H2O complex and its adducts have no antibacterial and antifungal activities.
Highlights
Nickel(II) complex of 4,4,4-trifluoro-1-(2-Naphthyl)-1,3-butanedione(tfnb) and its 2,2′-bipyridine, ethylenediamine and 1,10-phenanthroline adducts were synthesized and characterized by elemental analysis, infrared, electronic spectral, magnetic susceptibility measurements and antimicrobial activities
The infrared and electronic spectral measurements are indicative of a probable six-coordinate octahedral geometry for all the nickel(II) complexes and adducts
In continuation of studies on β-diketones and their derivatives (Omoregie, 2012; Omoregie et al; 2016; Omoregie et al, 2017), a report is presented on the synthesis, magnetic properties, spectral measurements and the antimicrobial activity of nickel(II) complexes of 4,4,4-trifluoro-1-(2-napthyl)-1,3-butanedione and their 2,2′-bipyridine, ethylenediamine and 1,10-phenanthroline adducts
Summary
Reagents used include nickel nitrate, 1,10-phenanthroline, 2,2 ́-bipyridine, ethylenediamine, 4,4,4-trifluoro-1-(2-napthyl)-1,3-butanedione, methanol, chloroform and methanol. NiNO3·6H2O (0.5462 g, 1.88 mmol) dissolved in water (1.2 mL) was added to a mixture of 4,4,4-trifluoro-1-(2-napthyl) 1,3-butanedione (0.50 g, 1.88 mmol) and 1,10-Phenanthroline(0.3723 g, 1.88 mmol) in methanol (5 mL). NiNO3·6H2O (0.5462 g, 1.88 mmol) dissolved in water (1.2 mL) was added to a mixture of 4,4,4-trifluoro-1-(2-napthyl) 1,3-butanedione (0.50 g, 1.88 mmol) and 2,2-bipyridine (0.2933 g, 1.88 mmol) in methanol (5 mL). Nickel chloride hexahydrate (0.36 g, 1.50 mmol) dissolved in 1.8 mL water was added to a mixture of benzoylacetone (0.24 g, 1.50 mmol) and 4,4,4-trifluoro-1-(2-napthyl) 1,3-butanedione (0.4 g, 1.50 mmol) in 5 mL methanol. Found C, 62.29; H, 3.70; N, 3.72 Ni, 7.38
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