The standard enthalpies of formation of the following fluorinated beta-diketones at T = 298.15 K were determined from their enthalpies of combustion measured using rotating bomb calorimetry. [GRAPHICS] With enthalpies of vaporization and sublimation, the enthalpies of formation of these beta-diketones were derived for the gaseous state in their enol and keto forms. Where applicable, the enthalpies of formation in the gaseous state correlated satisfactorily with values estimated by group additivity methods.