Propane → 1,1,1,2,3,3-Hexafluoro-4-methylpentane

Participants

Reaction Steps

n-Propane-(1.50 g., 34.2 mmole) and hexafluoropropene (1.71 g., 11.4 mmole) were heated together at 295° for 4 days in a 300 ml. Pyrex ampoule to give: (i) hexafluoropropene (0.55 g., 3.68 mmole; 32% recovery); (ii) n-propane (1.13 g., 25.5 mmole; 75% recovery); (iii) 1,1,1,2,3,3,-hexafluoro-4-methylpentane (CH3)2CH.CF2. CHF CF3 (1.20 g., 6.1 mmole; 80% based on C3F6 consumed) (Found: C, 37.4; H, 4.4; F, 58.1%; M, 194. C6H8F6 requires C, 37.2; H, 4.2; F, 58.6%; M, 194) b.p. 79.8° C. Reaction carried out at 330° C between n-propane and hexafluoropropene and on the same scale as above gave a lower yield (62% based on C3F6 consumed) of 1,1,1,2,3,3-hexafluoro-4-methylpentane.

Provenance & Evidence