| Abstract: | Spectrophotometric studies in the visible region have been made on chloroform solutions of CuL; [L: anions of hexafluoroacetylacetone (HFA), thenoyltrifluoroacetone (TTA), trifluoroacetylacetone (TFA) and acetylacetone (AA)J with imidazole. The acidity of CuL2 increases in the order: Cu(TFA)2 < Cu(TTA)22. Isolation of the adducts and the nature of the spectra is strong evidence for the formation of both 1:1 and 1:2 adducts in the chloroform solution. For Cu(AA)2-Im, neither such a spectral evidence was observed, nor the 1:1 adduct was isolated. By successive addition of imidazole, the displacement reaction takes place, and finally Cu(Im)4 is formed. |
