Synthesis of 5,6-Di(2-fluoro-2,2-dinitro ethoxy)-2,3-Dicyanopyrazine by One–step Nucleophilic Substitution and Its Energetic Properties

5,6-di(2-fluoro-2,2,–dinitroethoxy)-2,3-dicyanopyrazine was synthesized in a one-pot process starting from 5,6-dichloro-2,3-dicyanopyrazine. Its structure was fully characterized by ¹H, ¹³C, ¹⁵N and ¹⁹F NMR, mass spectroscopy, infrared spectrum as well as elementary analysis. Low-temperature X-ray diffraction was employed for analyzing its crystal structure. It exhibits excellent thermal stability (onset m.p. 203 ^oC, onset dec. 222 ^oC) which is comparable to those of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). Different from RDX, it shows good safety properties (IS>60 J, FS=160 N). Its detonation performance exceed those of 2,4,6-trinitrotoluene (TNT). The above-mentioned energetic performance show that it is insensitive and worth further potential applications.