From the reactions of carbonyl difluoride or formyl fluoride

3 From the reactions of carbonyl difluoride or formyl fluoride 

COCIF was obtained as one of the by-products from the reaction of carbonyi difluoride with a small excess of PCl at 265 C over 16 h in an autoclave. The reaction of COF with PCljFj (molar ratio 1 2) at 300 C for 12 h in an autoclave is also reported to 

The photochemical reaction of HC(0)F with a small excess of dichlorine has been used to prepare a synthetic sample of COCIF [656]. The reaction is considered to take place as shown in the following scheme  

Hydrogen chloride and dichlorine impurities were removed by fractional distillation and treatment with mercury, respectively. 

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