Pentacarbon dioxide

Pentacarbon dioxide
Names
IUPAC name
penta-1,2,3,4-tetraene-1,5-dione
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/C5O2/c6-4-2-1-3-5-7 Y
    Key: BKMBQDLZBSCFGV-UHFFFAOYSA-N Y
  • InChI=1/C5O2/c6-4-2-1-3-5-7
    Key: BKMBQDLZBSCFGV-UHFFFAOYAJ
  • O=C=C=C=C=C=O
Properties
C5O2
Molar mass 92.05 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Pentacarbon dioxide, officially penta-1,2,3,4-tetraene-1,5-dione, is an oxide of carbon (an oxocarbon) with formula C5O2 or O=C=C=C=C=C=O.

The compound was described in 1988 by Günter Maier and others, who obtained it by pyrolysis of 2,4,6-tris(diazo)cyclohexane-1,3,5-trione (C6N6O3).:97 Diazo transfer can produce the latter compound from phloroglucinol. It is stable at room temperature in solution. The pure compound is stable up to −90 °C, at which point it polymerizes.:100