Abstract: The perfluoro macrocycles perfluoro-18-crown-6, perfluoro-12-crown-4, perfluoro- 15-crown-5, perfluorocyclohexano-1 5-crown-5, perfluorodicyclohexano-1 8-crown-6, perfluorodicyclohexano-24-crown-8, and perfluoro-4, 7, 13, 16, 21, 24-hexaoxa-1, lO- diazabicyclo [8.8. 8] hexacosane (perfluorocryptand [222]) have been prepared by carefully controlled elemental fluorination. Although they are much weaker bases than their ...
![1,1,2,2-tetrafluoro-1-[1,1,2,2-tetrafluoro-2-(trifluoromethoxy)ethoxy]-2-(trifluoromethoxy)ethane Structure](https://image.chemsrc.com/caspic/196/40891-99-4.png)
![1,1,2,2-tetrafluoro-1,2-bis[1,1,2,2-tetrafluoro-2-(trifluoromethoxy)ethoxy]ethane Structure](https://image.chemsrc.com/caspic/294/64028-04-2.png)
