Synthesis and Characterization of Some Nickel(II) and Copper(II) Complexes of 2-substituted-4,4,4-trifluoro1-(2-thienyl)butane-1,3-dione (TTAH), their 2,2 '-Bipyridine and 1,10-Phenanthroline Adducts and X-Ray Structure of (2,2 '-Bipyridine)Bis(4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dionato)Nickel( II)

摘要

The nickel(II) and copper(II) complexes of 2-substituted-4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dione (R-TTAH) and their 2,2' -bipyridine and 1,10-phenanthroline adducts have been prepared and characterized by microanalysis, conductance, magnetic and spectral measurements. The conductance data in nitromethane indicate that the compounds are non-electrolytes except for [Cu(Phen)2TTA](TTA) and [Ni(Phen)3](TTA)2, which are 1:1 and 1:2 electrolytes respectively. The room temperature magnetic moments suggest that they are magnetically dilute compounds while the electronic spectral (solid and solution) bands of the ligands shifted upon chelation. The infrared spectra showed the different shifts of the carbonyl frequencies and a six-coordinate octahedral geometry formed by coordination of the nickel(II) ion through four oxygen atoms of the 4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dione (TTAH) and two nitrogen atoms of the bipyridine was established for (2,2' -bipyridine)bis{4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dionato}nickel(I I) using X-ray crystallography.