Chemistry: A European Journal 2005-12-23

Anhydrous phosphazenium fluorides as sources for extremely reactive fluoride ions in solution.

Reinhard Schwesinger, Reinhard Link, Peter Wenzl, Sebastian Kossek

Index: Chemistry 12(2) , 438-45, (2005)

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Abstract

Several peralkylated polyaminophosphazenium cations were evaluated for the generation of novel anhydrous F- salts. Two of them have been characterized by X-ray analysis and are particularly soluble, even in apolar aprotic solvents like benzene or THF, one of them even at -30 degrees C. Such solutions probably represent the most basic metal-free and stable media known to date. Comparison of these fluorides with known F- sources demonstrates that they are of unprecedented reactivity and selectivity in E2 elimination reactions.