Names  

Other names
Octaazapentacyclo[4.2.0.0^{2,5}.0^{3,8}.0^{4,7}]octane; Cubaazane; Nitrogen octaatomic molecule
 
Identifiers  
 
3D model (JSmol)


ChemSpider  
PubChem CID


CompTox Dashboard (EPA)


 
 
Properties  
N_{8}  
Molar mass  112.056 g·mol^{−1} 
Density  2.69 g/cm^{3} (predicted)^{[1]} 
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).  
verify (what is ^{YN} ?)  
Infobox references  
Octaazacubane is a hypothetical explosive allotrope of nitrogen with formula N_{8}, whose molecules have eight atoms arranged into a cube. (By comparison, nitrogen usually occurs as the diatomic molecule N_{2}.) It can be regarded as a cubanetype cluster, where all eight corners are nitrogen atoms bonded along the edges.^{[2]} It is predicted to be a metastable molecule, in which despite the thermodynamic instability caused by bond strain, and the high energy of the N–N single bonds, the molecule remains kinetically stable for reasons of orbital symmetry.^{[3]}
Explosive and fuel
Octaazacubane is predicted to have an energy density (assuming decomposition into N_{2}) of 22.9 MJ/kg,^{[4]} which is over 5 times the standard value of TNT. It has therefore been proposed (along with other exotic nitrogen allotropes) as an explosive, and as a component of high performance rocket fuel.^{[5]} Its velocity of detonation is predicted to be 15,000 m/s, much (48.5%) more than octanitrocubane, the fastest known nonnuclear explosive.^{[1]}
Cubic gauche nitrogen has an energy density of 33 MJ/kg exceeding octaazacubane by 50%.^{[6]}
See also
 Tetranitrogen (Nitrogen allotrope with formula N_{4})
 Hexazine (Nitrogen allotrope with formula N_{6})
 Azidopentazole (Nitrogen allotrope with formula N_{8})
 Bispentazole (Nitrogen allotrope with formula N_{10})^{[7]}
 Bis(pentazolyl)diazene (Nitrogen allotrope with formula N_{12})
 Eicosaazadodecahedrane (Nitrogen allotrope with formula N_{20})^{[8]}
 Hexacontaazabuckminsterfullerene (Nitrogen allotrope with formula N_{60})^{[9]}^{[10]}
 Pentazole
 1,1′Azobis1,2,3triazole
References
 ^ ^{a} ^{b} Agrawal, Jai Prakash (2010). High Energy Materials: Propellants, Explosives and Pyrotechnics. WileyVCH. p. 498. ISBN 9783527628803.
 ^ B. Muir. "Cubane"(See under "further topics" section.)
 ^ Patil, Ujwala N.; Dhumal, Nilesh R.; Gejji, Shridhar P. "Theoretical studies on the molecular electron densities and electrostatic potentials in azacubanes". Theoretical Chemistry Accounts: Theory, Computation, and Modeling (Theoretica Chimica Acta). 112. p. 27–32. doi:10.1007/s0021400405512.
 ^ Glukhovtsev, Mikhail N.; Jiao, Haijun; Schleyer, Paul von Ragué. "Besides N_{2}, What Is the Most Stable Molecule Composed Only of Nitrogen Atoms?". Inorganic Chemistry. 35. p. 7124–7133. doi:10.1021/ic9606237.
 ^ "Exploding the mysteries of nitrogen". Chemistry and Industry.
 ^ Yoo, ChoongShik (February 2003). "Novel Functional Extended Solids at Extreme Conditions". DTIC. p. 11. Retrieved 5 October 2015.
 ^ Manaa, M. R. (2000). "Toward new energyrich molecular systems: From N_{10} to N_{60}" (PDF). Chemical Physics Letters. 331 (2–4): 262–268. doi:10.1016/S00092614(00)011647.
 ^ Charkin, O. P. (2013). "Theoretical study of N_{20}, C_{20}, and B_{20} clusters "squeezed" inside icosahedral C_{80} and He_{80} cages". Russian Journal of Inorganic Chemistry. 58: 46–55. doi:10.1134/S0036023613010038.
 ^ Wang, L. J.; Zgierski, M. Z. (2003). "Superhigh energyrich nitrogen cluster N_{60}". Chemical Physics Letters. 376 (5–6): 698. doi:10.1016/S00092614(03)010583.
 ^ https://www.llnl.gov/str/June01/Manaa.html