Abstract
Differential thermal analysis and thermogravimetric analysis of copper(II) and nickel(II) complexes of [4,4′-(l-ethyl-2-methyl-1,2-ethanediyl)dinitrilo]bis(1,1,1-trifluoro-2-pentanone) [bis(trifluoroacetyl-acetone)ethylmethylethylenediiminel(H 2F 3A 2EMen) and [4,4′-(l-ethyl-2-methyl-1,2-ethanediyl)dinitrilo]-bis(1,1,1-trifluoro-6-methyl-5-hepten-2-one) [bis(ti-ifluoroacetylmesityl oxide)ethylmethylethylenediimine] (H 2F 3AM 2EMen) and copper(II), nickel(II) and oxovanadium(IV) complexes of [4,4′-(1-ethyl-2-methyl-1,2-ethanediyl)dinitrilo]bis(2-pentanone) [bis(acetylacetone)ethylmethylethylenediimine] (H 2A 2EMen) were carried out and losses in weight between 78 and 100% occurred at temperatures up to 300°C. The copper, nickel and oxovanadium complexes of H 2A 2EMen are adequately separated by gas chromatographic (GC) columns, but the copper and nickel complexes of H 2F 3A 2EMen and H 2F 3AM 2EMen could not be resolved. The copper and nickel complexes of H 2F 3A 2EMen and H 2F 3AM 2EMen and the copper, nickel and oxovanadium complexes of H 2A 2EMen were separated on normal- and reversed-phase high-performance liquid chromatographic (HPLC) columns. The elution of copper and nickel complexes on GC and HPLC columns was compared in order to evaluate the effects of substituents on elution.
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