Pentafluoro-λ6-sulfanyl (SF5) perfluoroalkyl iodides-synthesis and reaction with ethylene and tetrafluoroethylene crystal structure of SF5(CF2)4CH2CH2I

Abstract A series of reactions between SF 5 CF 2 CF 2 I and SF 5 (CF 2 ) 4 I with F 2 CCF 2 was carried out in an effort to find the most effective methods for chain-extension. Also, for the first time, SF 5 (CF 2 ) 8 I and SF 5 (CF 2 ) 10 I have been prepared and isolated. The reaction conditions for the addition of H 2 CCH 2 were also investigated. A determination of the crystal structure of the SF 5 (CF 2 ) 4 CH 2 CH 2 I has been carried out: the crystal system is monoclinic, with space group P2(1)/ n and a =23.465(5) A; b =6.0971(12) A; c =44.892(9) A; α =90°; β =99.38(3)°; γ =90°; Z =20.