Chemical compound

Dinitrogen dioxide is an inorganic compound having molecular formula N
. Many structural isomers are possible. The covalent bonding pattern O=N–N=O (a non-cyclic dimer of nitric oxide (NO)) is predicted to be the most stable isomer based on ab initio calculations and is the only one that has been experimentally produced.[1] In the solid form, the molecules have C2v symmetry: the entire structure is planar, with the two oxygen atoms cis across the N–N bond. The O–N distance is 1.15 Å, the N–N distance is 2.33 Å, and the O=N–N angle is 95°.[2]


  1. ^ Nguyen, Kiet A.; Gordon, Mark S.; Montgomery, John A. Jr.; Michels, H. Harvey (October 1994). "Structures, Bonding, and Energetics of N2O2 Isomers". The Journal of Physical Chemistry. 98 (40): 10072–10078. doi:10.1021/j100091a021.
  2. ^ Park, Jong Keun; Sun, Hosung (1999). "Theoretical Determination of Geometrical Structures of the Nitric Oxide Dimer, (NO)2". Bulletin of the Korean Chemical Society (in Korean). 20 (12): 1399–1408. ISSN 0253-2964.
  • East, Allan L. L. (August 8, 1998). "The 16 valence electronic states of nitric oxide dimer (NO)2". Journal of Chemical Physics. 109 (6): 2185–2193. doi:10.1063/1.476786.
  • Harcourt, Richard D. (April 1990). "The origin of the long N–N bond in N2O2: an ab initio valence bond study". Journal of Molecular Structure: THEOCHEM. 206 (3–4): 253–264. doi:10.1016/0166-1280(90)85140-I.[1]
  • Dkhissi, Ahmed; Soulard, Pascale; Perrin, Agnès; Lacome, Nelly (May 1997). "The NO Dimer". Journal of Molecular Spectroscopy. 183 (1): 12–17. doi:10.1006/jmsp.1996.7249.