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

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 CF_nCl_3-nSCl leads to CF₃SeSCF_nCl_3-n (n = 1, 2, 3). IR, NMR and mass spectra of the newly prepared compounds were presented.