Physicochemical studies of copper(II) ß-diketonate: Magnetic and spectral properties of copper(II) complexes of  2-alkyl-1-phenyl-1,3-butanedione, their 2,2'-bipyridine and 1,10-phenanthroline adducts

By H.Oluwatola Omoregie and J.A.O. Woods

A series of copper(II) complexes of 2-alkyl-1-phenyl-1,3-butanedione (2-R-BzacH) and their 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen) adducts have been synthesized and characterized by microanalysis, conductance, magnetic and spectral measurements.  The conductivity measurements in nitromethane indicate that the complexes are non-electrolytes while  the adducts are 1:1 electrolytes except Cu(n-Pr-bzac)2bipy, Cu(n-Pr-bzac)2phen, Cu(i-Pr-bzac)2bipy and Cu(i-Pr-bzac)2phen that are non-electrolytes.  The room temperature magnetic moments suggest that they are magnetically dilute compounds while the visible absorption spectra of the compounds showed the influence of variation of solvents and suggest plausible 4-and 5- coordinate geometries (Square planar and square pyramidal) which have been proposed, respectively.

Key words: 2-Substituted-1-phenyl-1,3-butanedione, spectra studies, magnetic susceptibility studies, elemental analysis.

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