Names | |
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Preferred IUPAC name
Buta-1,2,3-triene-1,4-dione | |
Identifiers | |
3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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CompTox Dashboard (
EPA)
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Properties | |
C4O2 | |
Molar mass | 80.042 |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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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 or O=C=C=C=C=C=O, and so on.
The compound was obtained in 1990 by Günther Maier and others, by flash vacuum pyrolysis of cyclic azaketones in a frozen argon matrix. [2] It was also obtained in the same year by Detlev Sülzle and Helmut 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]