Journal article

Publication year: 1996

Pages: 4463-4470

Journal: Journal of the Chemical Society. Dalton transactions

Issue number: 23

ISSN: 0300-9246

DOI Link: https://doi.org/10.1039/DT9960004463

Publisher: Royal Society of Chemistry

Abstract: 
With the synthesis of CF3(F)C=Te, the second, non-resonance stabilised perfluorinated telluracarbonyl has been isolated and characterised by gas-phase IR and mass spectrometry. It was prepared via pyrolysis of the novel compound Me(3)SnTeC(2)F(5) at 500 degrees C, 10(-3) Torr in 40-50% yield. The compound CF3(F)C=Te is only stable at -196 degrees C and dimerises quantitatively a few degrees above this temperature to the corresponding mixture of cis/trans-2,4-bis(trifluoromethyl)-2,4-difluoro-1,3-ditelluranes which cannot be separated by physical nor chemical procedures. Their reaction with BX(3)(X = Cl or Br) yielded chlorinated and brominated cis/trans-1,3-ditelluretanes. Additionally the telluracarbonyl undergoes a cycloaddition reaction with 2,3-dimethylbutadiene forming 2-fluoro-3,6-dihydro-4,5-dimethyl-2-trifluoromethyltellurin. The required precusors for the synthesis of the perfluorinated telluracarbonyls Te(2)R(2) and Te(2)R(2) were prepared by three different methods. The compounds Me(3)SnTeR [R = C2F5 or (CF3)(2)CF] were obtained from Te-x(C2F5)(2) (x = 1 or 2) or Te[(CF3)(2)CF](2) and Me(3)SnH in good yield.

Harvard Citation style: Beck, J., Haas, A., Herrendorf, W. and Heuduk, H. (1996) Trifluorotelluroacetyl fluoride, its cyclic dimer and precursors: Preparation, characterisation and reactivity, Journal of the Chemical Society. Dalton transactions(23), pp. 4463-4470. https://doi.org/10.1039/DT9960004463

APA Citation style: Beck, J., Haas, A., Herrendorf, W., & Heuduk, H. (1996). Trifluorotelluroacetyl fluoride, its cyclic dimer and precursors: Preparation, characterisation and reactivity. Journal of the Chemical Society. Dalton transactions(23), 4463-4470. https://doi.org/10.1039/DT9960004463