Isobutane → 1,1,1,2,3,3-Hexafluoro-4,4-dimethylpentane

Participants

Reaction Steps

Isobutane (1.98 g., 34.2 mmole) and hexafluoropropene (1.71 g., 11.4 mmole) were heated at 295° for 4 days to give: (i) isobutane (1.42 g., 24.4 mmole; 71% recovery); (ii) hexafluoropropene (0.51 g., 3.4 mmole; 30% recovery); (iii) 1,1,1,2,3,3-hexafluoro-4,4-dimethylpentane (CH3)3C. CF2. CHF. CF3 (1.39g., 6.7 mmole; 84% based on C3F6 consumed) (Found: C, 40.6; H, 4.7%; M, 209. C7H10F6 required C, 40.4; H, 4.8%; M, 208), b.p. 101° C. Similar reactions carried out at 210° C, 260° C and 330° C gave respectively 2% 43% and 51% conversions to 1,1,1,2,3,3-hexafluoro-4,4-dimethylpentane (100%, 80% 52% yields based on C3F6 consumed).

Provenance & Evidence