Vereinfachte Synthese und Reaktionen von Selenocarbonyldifluorid / A Simplified Synthesis and Reactions of Selenocarbonyldifluorid

Abstract

Abstract SeCF2 is prepared on a preparative scale reacting AII3 with Hg(SeCF3)2 in octamethyl-cyclotetrasiloxane. It adds MF [M = Cs, Tl, [(CH3)4N] and Ag] to form MSeCF3. AgSeCF3 was also synthesized from AgF and B(SeCF3)3. Under the influence of sunlight SeCF2 dissolved in CFCI3 dimerizes quantitatively to 2,2,4,4-tetrafluoro-1,3-diselenetane, which above 360 °C pyrolyses to the monomer. The cyclic dimer reacts with B(SeCF3)3 to give (CF3Se)2CSe. The reaction of AgSeCF3 with CFnCl3-nSCl leads to CF3SeSCFnCl3-n (n = 1, 2, 3). IR, NMR and mass spectra of the newly prepared compounds were presented.