Potassium 1,1,2,2-tetrafluoroethanesulfonate → (3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluorooctyl)-trioctylphosphonium 1,1,2,2-tetrafluoroethanesulfonate

Trioctyl phosphine (31 g) was partially dissolved in reagent-grade acetonitrile (250 ml) in a large round-bottomed flask and stirred vigorously. 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane (44.2 g) was added, and the mixture was heated under reflux at 110 degrees C. for 24 hours. The solvent was removed under vacuum giving (3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-trioctylphosphonium iodide as a waxy solid (30.5 g). Potassium 1,1,2,2-tetrafluoroethanesulfonate (TFES-K, 13.9 g) was dissolved in reagent grade acetone (100 ml) in a separate round-bottomed flask, and to this was added (3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)-trioctylphosphonium iodide (60 g). The reaction mixture was heated at 60 degrees C. under reflux for approximately 16 hours. The reaction mixture was then filtered using a large frit glass funnel to remove the white Kl precipitate formed, and the filtrate was placed on a rotary evaporator for 4 hours to remove the acetone. The liquid was left for 24 hours at room temperature and then filtered a second time (to remove Kl) to yield the product (62 g) as shown by proton NMR.

1. temperatureunder reflux for approximately 16 hours
2. filtrationThe reaction mixture was then filtered
3. customto remove the white Kl precipitate
4. customformed
5. customthe filtrate was placed on a rotary evaporator for 4 hours
6. customto remove the acetone
7. filtrationfiltered
8. customa second time (to remove Kl)

ORD record

ord-9edaa27ba13a47bcbc3878b0cc8003d3

Source dataset

uspto-grants-2010_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07829739B2