Accession Number : AD0015440


Title :   THE PREPARATION AND PROPERTIES OF ZIRCONIUM AND HAFNIUM CHELATES OF CERTAIN beta DIKETONES


Corporate Author : WISCONSIN UNIV-MADISON


Personal Author(s) : Larsen, Edwin M ; Terry, Glenn ; Leddy, James


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/015440.pdf


Report Date : 03 Aug 1953


Pagination or Media Count : 20


Abstract : Compounds of Zr and Hf with the composition of MK4 were prepared with the following diketones: acetylacetone, trifluoroacetylacetone, 2-furoylacetone, 2-furoyltrifluoroacetone, 2-thenoylacetone, 2-thenoyltrifluroacetone, and 2-pyrroyltrifluoroacetone. The densities of the chelate compounds were determined by the standard pycnometer method with H20 or petroleum ether saturated with the chelate as the immersion liquid. The molecular volumes calculated were greater for the Hf compound than the Zr compound except for acetylacetone and 2-pyrroyltrifluoroacetone derivatives where the molecular volumes were almost identical. The UV absorption spectra for the non-fluorine containing chelate compounds in cyclohexane are similar to the parent diketones. For the metal derivatives of the fluorinated diketones, the lambda max associated with the enol ring is shifted to longer wave lengths, as compared to the lambda max of the free diketone. The lambda max for the Zr chelates shifted to slightly longer wave lengths than for corresponding Hf compounds.


Descriptors :   *CHELATE COMPOUNDS , *KETONES , CYCLOHEXANES , FLUORINATION , ULTRAVIOLET SPECTRA , HAFNIUM COMPOUNDS , ZIRCONIUM COMPOUNDS , ABSORPTION SPECTRA


Subject Categories : Organic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE