Fluorophosphines Containing Phosphorus-Nitrogen Bonds

The first report of this type of compound in the patent literature erroneously describes Et2NPF2 as a gas which condenses at —78°C (294) however, this could not be subsequently confirmed and later work showed that the compound in fact boils at 96°C (287). 

Dialkylamino- and alkylarylaminodifluorophosphines which are listed in Table IV are colorless, mobile liquids with an unpleasant smell. They are hydrolyzed only fairly slowly by cold water and fume slightly in air. 

Several synthetic approaches to this class of compounds have been developed, the most convenient being fluorination of the corresponding dialkylaminochlorophosphine with either antimony trifluoride 2S7, 13, 138), zinc fluoride 138, 252), or sodium fluoride in tetramethylene sulfone 287, 291, 270, 213). No redox reactions of the type discussed in Section III are observed. 

Several dialkylaminodifluorophosphines can also be prepared by treating difluorotrichloromethylphosphine with the appropriate secondary amine at room temperature 13, 225), the reaction involving an 

Trifluorophosphine and dimethylamine readily afford either di-methylaminodifluorophosphine or bis(dimethylamino)fluorophosphine 17,107). The latter until recently was the only well-characterized mem- 

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