Today, researchers are paying special attention to dicarbonyl compounds containing fluorine substituents and their derivatives, because the practical use of such compounds is determined by their important properties. The presence of a fluorine atom in the molecule and high extraction ability allow them to be used as chelating reagents in gas-liquid spectrophotometric chromatography and fluorescent analysis. Complexes of fluorinated β dicarbonyl compounds with lanthanoids (mainly europium and praseodymium) are widely used as "shifting" reagentsin NMR spectroscopy