Thermal decomposition of energetic materials. 45. Fast thermolysis patterns of energetic oxamides

Abstract

Fast thermal decomposition (dT/dt=70-80°C sec⁻¹) of four energetic oxamides [N,N′-bis(2-nitratoethyl) oxamide, N,N′-bis(3-nitratopropyl)oxamide, N,N′-bis(2-nitratopropyl)oxamide, and N,N′-bis(2-azidoethyl)oxamide] in Ar is described by FTIR/temperature profiling. The product sequence and temperatures are used to analyze how the alkyl chain length, the position of the nitrate ester group, and the nature of the energetic group affect the thermolysis process. The crystal structure of N,N′-bis(3-nitratopropyl)oxamide was determined: monoclinic,P2₁/c,a=5.125(2),b=6.906(2),c=18.441(8) Å,β=94.91(3)°,V=650.3(4) ų,Z=2,D=1.502 g cm⁻³,R(F)=0.036,R(wF)=0.044.