Hexafluoroacetylacetone
Hexafluoroacetylacetone is the chemical compound with the nominal formula CF3CCH2CCF3. This colourless liquid is a ligand precursor and a reagent used in MOCVD. The compound exists exclusively as the enol CF3C=CHCCF3. For comparison under the same conditions, acetylacetone is 85% enol.
Metal complexes of the conjugate base exhibit enhanced volatility and Lewis acidity relative to analogous complexes derived from acetylacetone.
The visible spectra of biscopper and its dehydrate have been reported in carbon tetrachloride..
Compounds of the type biscopper:Bn, where :B are Lewis bases such as N,N-dimethylacetamide, dimethyl sulfoxide, or pyridine and n = 1 or 2, have been prepared. Since biscopper is soluble in carbon tetrachloride, its Lewis acid properties have been studied for 1:1 adducts using a variety of Lewis bases..
Its Lewis acid properties have been analyzed by the ECW model yielding EA= 1.82 and CA= 2.86. When biscopper forms an adduct with triethylamine, steric repulsion due to ethyl groups on nitrogen results but for Lewis bases such as pyridine and ethyl acetate steric repulsion is not observed.
This organofluorine compound was first prepared by the condensation of ethyl ester of trifluoroacetic acid and 1,1,1-trifluoroacetone. It has been investigated as an etchant for copper and its complexes, such as Cu have been employed as precursors in microelectronics.
Being highly electrophilic, hexafluoroacetylacetone is hydrated in water to give the tetraol.
