Imidazolium-Based Heterocydes

All these compoimds are well-characterized solids, hi general, the nitrate salts have lower melting points and thermal stabiUties than the corresponding perchlorates. Energetic salts containing imidazolium triazolate or tetrazolate, and tetrazoUum imidazolate are described in Sect. 2.5. 

Heptanitrocubane (125) is easily soluble in polar solvents, such as acetone, THE, and dichloromethane. Single crystal X-ray analysis of 125 has provided an accurate density at 21 °C of 2.028 g cm and showed many intermolecular contacts around each molecule. A solution of 125 in methanol turned yellow which may be due to the anion. Octanitrocubane (128) is a stable, white solid and somewhat soluble in hexane but readily soluble in polar organics. Characterization of 128 was based on single crystal X-ray analysis [115]. 

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