Trifluorovinylsulfur pentafluoride dimerizes to (SF5CFCF2)2 in the presence of cesium fluoride. Two derivatives of trifluorovinylsulfur pentafluoride, SF5CF(CF3)C(O)F and SF5CF(CF3)C(O)NH2, were used to prepare the new compounds, SF5CF(CF3)CO2H and SF5CF(CF3)CN, respectively. The first was prepared by reacting the SF5-acid fluoride with water, while the second involved the abstraction of water from the SF5-amide using P4O10. The attempted preparation of a bis-pentafluorosulfur ketone and a pentafluorosulfur containing acid anhydride were unsuccessful. Selected transition and post transition metal chlorides and elements undergo oxidative displacement and oxidative addition reactions with F-(tert-butyl) hypochlorite, (CF3)3COCl, to form new F-(tert-butoxides). Preliminary studies with selected aromatic systems were also carried out.