A New Synthetic Route for 3, 3′-Bis(fluorodinitromethyl)difurazanyl Ether (FOF-13) and Its Energetic Properties. Issue 1 (2nd January 2016) - Zhai, Lianjie
Abstract : A new protocol for preparation of 3, 3-bis(fluorodinitromethyl)difurazanyl ether (FOF-13) was developed. It involves (i) nitration of 3, 3'-bis(chlorohydroxyminomethyl)difurazanyl ether with N2 O5 /MeCN to give 3, 3-bis(chlorodinitromethyl)difurazanyl ether (4 ), (ii) reduction of4 with KI/MeOH to obtain potassium salt of 3, 3'-bis(dinitromethyl)difurazanyl ether (6 ) and (iii) fluorination of6 with XeF2 in anhydrous acetonitrile to form the desired FOF-13. FOF-13 was fully characterized by IR, 13 C NMR, 19 F NMR, and elemental analysis. FOF-13 exhibits excellent physicochemical and detonation properties, such as high density (1.91 g cm ‒3 ), good thermal stability, reasonable impact sensitivity (14 J) and friction sensitivity (64%), high measured detonation velocity (8497 m s ‒1 at 1.69 g cm ‒3 ). Furthermore, the precursors4 and6 were developed for the first time.