Tetracarbon dioxide

Tetracarbon dioxide
Identifiers
Jmol-3D images Image 1
Properties
Molecular formula C4O2
Molar mass 80,04 g/mol
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Tetracarbon dioxide is an oxide of carbon, a chemical compound of carbon and oxygen, with chemical formula C4O2 or O=C=C=C=C=O. It can be regarded as butatriene dione, the double ketone of butatriene — more precisely 1,2,3-butatriene-1,4-dione.[1]

Butatriene dione is the fourth member of the family of linear carbon dioxides O(=C)n=O, that includes carbon dioxide CO2 or O=C=O, ethylene dione C2O2 or O=C=C=O, carbon suboxide C3O2 or O=C=C=C=O, pentacarbon dioxide C5O2 O(=C)5=O, and so on.

The compound was obtained in 1990 by Maier and others, by flash pyrolysis of cyclic azaketones in a frozen argon matrix.[2] It was also obtained in the same year by Sülzle and Schwartz through impact ionization of ((CH3-)2(C4O2)(=O)2=)2 in the gas phase.[3] Although theoretical studies indicated that the even-numbered members of the O(=C)n=O family should be inherently unstable,[4] C4O2 is indefinitely stable in the matrix, but is decomposed by light into tricarbon monoxide C3O and carbon monoxide CO.[2][1]. It has a triplet ground state.[1]

References

  1. ^ a b c J.I.G. Codagan, John Buckingham, Finlay J. MacDonald, P. H. Rhodes (1996), Dictionary of Organic Compounds. CRC Press, ISBN: 0412540908, 9780412540905. 9000 pages.
  2. ^ a b Günther Maier, Hans Peter Reisenauer, Heinz Balli, Willy Brandt, Rudolf Janoschek(1990), C4O2 (1,2,3-Butatriene-1,4-dione), the First Dioxide of Carbon with an Even Number of C Atoms. Angewandte Chemie Int. Ed., volume 29, p. 905–908.
  3. ^ Detlev Sülzle, Helmut Schwartz (1990), Identification of Butatrienedione, Its Radical Anion, and Its Radical Cation in the Gas Phase. Angewandte Chemie Int. Ed., volume 29, p. 908–909.
  4. ^ V. Krishnamurthy and V. H. Rawal (1997), J. Org. Chem., volume 62, 1572.
Common oxides
Exotic oxides
Compounds derived from oxides