engleski

Thermal decomposition study of mercurated hexafluoro- and trifluoroactylacetone

This work presents preparation and thermal characterization of three novel organomercurials: Hg2(CF3COCHCOCF3)2-μ 2-(CF3COCCOCF3)μ 2(CF3C(OH)2CH2C(OH)2CF3) (I), Hg2(CF3COCHCOCF3)2-μ 2-(CF3COCCOCF3) (II) and Hg2(CH3COCHCOCF3)2-μ 2-(CH3COCCOCF3) (III) which means that they contain at least one direct mercury-to-carbon bond among the carbonyl groups of β -diketone molecules which are capable for chelating of metal ions. IR-spectra support the conclusion that mercury is most probably bound to the γ -carbon of fluorinated derivatives of acetylacetone and is not chelated through oxygen in any of the isolated compounds. The thermal decomposition of mercurated hexafluoro- and trifluoroacetylacetone in nitrogen occurs in a few steps. Each step was identified and studied by simultaneous DTA/TG analyzer. On the basis of dynamic heating experiments by TG applying Flynn-Wall method the activation energy for each of them was determined.

thermal decomposition; mercurated hexafluoro- and trifluoroactylacetone

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