Group 1 metal fluorides carbonyl difluoride

Fluorine and trifluoromethyl groups appear to stabilize oxygen catenation. The trioxide can be approached alternatively by the reaction of oxygen difluoride and carbonyl difluoride over a metal fluoride catalyst. Depending on conditions, the trioxide will be the major product (equations 56 and 57). 

Group 1 metal fluorides have been employed as column packings for the determination of COF2 (and other fluorocarbonyl compounds) in mixtures with tetrafluoroethene [967]. By using a column composed of CsF supported upon CaFj, the tetrafluoroethene is not chemisorbed and is eluted rapidly. The fluorocarbonyl compounds (CF3)jC=0 (b.pt. -28 C), CF3C(0)F (b.pt. -59 C), and COF (b.pt. -84.6 C), however, are eluted in reverse order of boiling temperatures, so that carbonyl difluoride is eluted last [967]. The chemisorption arises from the reversible chemical process [1692] ... 

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