Volatility studies of metal chelates : VII. 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

✍ Scribed by Sergio Dilli; Kevin Robards

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 613 KB
• Volume: 322
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)97655-1

✦ Synopsis

Gas chromatographic behaviour of chelates derived from the aromatic /Idiketones 1 -phenylbutane-1,3dione and 4,4+trilluoro-1 -(pentalluorophenyl)butane-1,3dione are reported. Although the chelates of the non-fluorinated ligand fail to elute from a wide range of liquid phases and supports, several of the fluorinated chelates can be successfully chromatographed, consistent with their thermoanalytical behaviour. Included here are the chromium(III), aluminium(III), iron(III), vanadium(III), copper(H) and oxovanadium(IV) derivatives. In contrast, the zinc, cobalt-(II), cobalt(III), manganese(II), nickel(H) and dioxouranium(VI) chelates are totally retained on diverse supports despite, in some cases, adequate volatility and stability. Even for those chelates which elute satisfactorily, abnormalities are apparent. Several chelates of 1 , 1,1,2,2,3,3-heptatluoro-7,7dimethyloctane+dione

were used to elucidate these factors by coupled gas chromatography-mass spectrometry.