Nitro‐Substituted Bishomocubanes: Synthesis,Characterization, and Application as Energetic Materials |
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| Authors: | Sohan Lal Dr Sundaram Rajkumar Amit Tare Dr Sasidharakurup Reshmi Prof Dr Arindrajit Chowdhury Prof Dr Irishi N N Namboothiri |
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| Institution: | 1. Department of Chemistry, Indian Institute of Technology, Bombay, Mumbai 400076 (India), Fax: (+91)?22‐2576‐7152, 2572‐3480;2. Present address: School of Chemistry, University of Leeds, Leeds LS2 9JT (UK);3. Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai 400076 (India), Fax: (+91)?22‐2572 6875;4. Polymers and Special Chemicals Group, PCM Entity, Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram, Kerala 695022 (India) |
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| Abstract: | Several high‐energy‐density strained polycyclic compounds nitromethyl‐l,3‐bishomocubane (NMBHC), nitromethylene‐1,3‐bishomocubane (NMyBHC), and bis(nitromethyl)‐1,3‐bishomocubane (DNTMBHC), which were synthesized for the first time from bishomocubanone, hold potential for application as standalone fuels in liquid bipropellant systems or as additives in liquid and solid propellant formulations. DFT analysis at the B3LYP/6‐31G(d) level of theory was employed to optimize the geometries of the compounds and to determine their densities, heats of formation, and various thermodynamic properties. The density specific impulse, determined by using equilibrium thermodynamics, demonstrated an improvement of 75 s for NMBHC and NMyBHC over standard hydrocarbons. The specific impulse with ammonium perchlorate showed an improvement of 25–30 s over hydroxy‐terminated polybutadiene. Thermogravimetric analysis revealed that NMBHC, NMyBHC, and DNTMBHC evaporated readily with activation energies of 58.8, 69.2, and 74.5 kJ mol?1, respectively. |
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| Keywords: | cage compounds energetic materials fuels nitro compounds thermogravimetric analysis |
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