Tetraoxygen



O4 is also a subclass of O-class stars.

The tetraoxygen molecule (O4) was first predicted in 1924 by mass spectrometry experiments.[4]

Red oxygen

As the pressure of oxygen at room temperature is increased through 10 GPa, it undergoes a dramatic absorption spectrum, this phase is believed to consist of O4 molecules in a crystal lattice.[3]

rocket fuel, and it has been speculated that red oxygen could make an even better fuel, because of its higher energy density.[7]

At 96 GPa, oxygen undergoes another phase transition and becomes metallic.[5]

Free molecule

Theoretical calculations have predicted the existence of cyclobutane,[8] and a "pinwheel" with three oxygen atoms surrounding a central one.[9]

In 2001, a team at the University of Rome La Sapienza conducted a neutralization-reionization mass spectrometry experiment to investigate the structure of free O4 molecules.[4] Their results did not agree with either of the two proposed molecular structures, but they did agree with a complex between two O2 molecules, one in the ground state and the other in a specific excited state.

See also

  • Ozone (O3)
  • Tetranitrogen (N4)

References

  1. ^ Lewis, Gilbert N. (September 1924). "The Magnetism of Oxygen and the Molecule O2". Journal of the American Chemical Society 46 (9): 2027–2032. doi:10.1021/ja01674a008.
  2. ^ Oda, Tatsuki; Alfredo Pasquarello (October 2004). "Noncollinear magnetism in liquid oxygen: A first-principles molecular dynamics study". Physical Review B 70 (134402): 1–19. doi:10.1103/PhysRevB.70.134402.
  3. ^ a b Gorelli, Federico A.; Lorenzo Ulivi, Mario Santoro, and Roberto Bini (November 1999). "The ε Phase of Solid Oxygen: Evidence of an O4 Molecule Lattice". Physical Review Letters 83 (20): 4093–4096. doi:10.1103/PhysRevLett.83.4093.
  4. ^ a b Cacace, Fulvio; Giulia de Petris, and Anna Troiani (October 2001). "Experimental Detection of Tetraoxygen". Angewandte Chemie International Edition 40 (21): 4062–4065. doi:10.1002/1521-3773(20011105)40:21%3c4062::AID-ANIE4062%3e3.0.CO;2-X.
  5. ^ a b Akahama, Yuichi; Haruki Kawamura, Daniel Häusermann, Michael Hanfland, and Osamu Shimomura (June 1995). "New High-Pressure Structural Transition of Oxygen at 96 GPa Associated with Metallization in a Molecular Solid". Physical Review Letters 74 (23): 4690–4694. doi:10.1103/PhysRevLett.74.4690.
  6. ^ Nicol, Malcolm; K. R. Hirsch, and Wilfried B. Holzapfel (December 1979). "Oxygen Phase Equilibria near 298 K". Chemical Physics Letters 68 (1): 49–52.
  7. ^ Ball, Phillip. "New form of oxygen found", Nature News, 16 November 2001. Retrieved on 2006-07-13. 
  8. ^ Hernández-Lamoneda, R.; A. Ramírez-Solís (September 2000). "Reactivity and electronic states of O4 along minimum energy paths". Journal of Chemical Physics 113 (10): 4139–4145. doi:10.1063/1.1288370.
  9. ^ Røeggen, I.; E. Wisløff Nilssen (May 1989). "Prediction of a metastable D3h form of tetra oxygen". Chemical Physics Letters 157 (5): 409–414.
 v • d • e Allotropes of oxygen

triplet)
O2

|
 

Ozone (Trioxygen)
O3

|
 

Tetraoxygen
O4

|
 

Metallic oxygen
Ox

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Tetraoxygen". A list of authors is available in Wikipedia.