The syntheses of two different isomeric dinitropyrazole N-oxides are described and compared to each other. 3,4-Dinitropyrazole-1N-oxide (2) and 3,5-dinitropyrazole-1N-oxide (4) were used, and four different nitrogen-rich salts were synthesized in order to enhance performance and sensitivity values. Furthermore, two methylene-bridged isomeric dinitropyrazoles were synthesized by using diiodomethane. The obtained compounds were characterized by using low-temperature single-crystal X-ray diffraction, IR spectroscopy, multinuclear NMR spectroscopy, mass spectrometry, elemental analysis and DSC measurements. The bridged compounds show a high thermal stability (T dec. : 319°C and 330°C) whereas the ionic compounds [a] 4125 Scheme 1. Synthesis of bis(3,5-dinitro-pyrazol-1-yl)methane (1), bis(3,4-dinitro-pyrazol-1-yl)methane (3), 3,4-dinitropyrazol-1-oxide (2) and 3,5-dinitropyrazol-1-oxide (4) as well as the ionic derivatives of 2 and 4.