Add time:08/26/2019         Source:sciencedirect.com

Gas chromatographic behaviour of chelates derived from the aromatic β-diketones 1-phenylbutane-1,3-dione and 4,4,4-trifluoro-1-(pentafluorophenyl)butane- 1,3-dione and reported. Although the chelates of the non-fluorinated ligand fail to elute from a wide range of liquid phase and supports, several of the fluorinated chelates can be successfully chromatographed, consistent with their thermoanalytical behaviour. Included here are the chronium(III), aluminium(III), iron(III), vanadum(III), copper(II) and oxovanadium(IV) derivativers. In contrast, the zinc, cobalt(II), cobalt(III), manganese(II), nickel(II) and dioxouranium(VI) chelates are totally retained on diverse supports despite, in some cases, adequate volatility and stability. Even for those chelates which elute satisfactory, abnormalities are apparent. Several chelates of 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dione were used to elucidate these factors by coupled gas chromatography—mass spectrometry.

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