Trifluoroiodomethane2314-97-8100 % similar 1,2-Diiodotetrafluoroethane354-65-438 % similar Pentafluoroethyl iodide354-64-331 % similar 1,4-Diiodoperfluorobutane375-50-831 % similar Perfluoroisopropyl iodide677-69-031 % similar