Synthesis and properties of 3,4,5-trinitropyrazole-1-ol and its energetic salts

3,4,5-Trinitropyrazole-1-ol and its nitrogen-rich salts were synthesized and well characterized by H-1, C-13 NMR (some with N-15 NMR), and IR spectroscopy, and by elemental analysis. Additionally, the structures of the ammonium and triazolium 3,4,5-trinitropyrazole-olates were confirmed by single-crystal X-ray diffraction. With respect to measured or calculated properties, such as thermal stability (T-d, 118-186 degrees C), density (1.72-1.90 g cm(-3)), detonation performance (P, 28.77-36.40 GPa; vD, 8175-8676 m s(-1)), and impact sensitivity (1-40 J), 3,4,5-trinitropyrazole-1-ol and its salts have the potential to be useful energetic materials.