Method A. d, 6-Bis (4-hydrooeta $ uorobutyl)-1, 3,~-oxadia-zob [I. Rf=(CF,), H]. An intimate mixture of 3.3 mmoles (6.5 g.) of 1, 2-bis (5-hydrooctafluorovaleryl) hydrazine and 46 mmoles (6.5 g.) of phosphorus pentoxide was heated ata bath temperature of 250'for 1 hr. The volatile product was distilled under reduced pressure to give 4.8 g.(77% yield) of crude product. Fractionation at atmospheric pressure gave 3.7 g.(59% yield) of 2, 5-bis ( ...
