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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).[1][2]: 97 Diazo transfer can produce the latter compound from phloroglucinol.[1] It is stable at room temperature in solution.[1] The pure compound is stable up to −90 °C, at which point it polymerizes.[2]: 100
References
- ^ a b c Maier, G.; Reisenauer, H. P.; Schäfer, U.; Balli, H. (1988). "C5O2 (1,2,3,4-Pentatetraene-1,5-dione), a New Oxide of Carbon". Angewandte Chemie International Edition. 27 (4): 566–568. doi:10.1002/anie.198805661.
- ^ a b Eastwood, F. W. (1997). "Gas Phase Pyrolytic Methods for the Preparation of Carbon-Hydrogen and Carbon-Hydrogen-Oxygen Compounds". In Vallée, Y. (ed.). Gas Phase Reactions in Organic Synthesis. CRC Press. ISBN 90-5699-081-0.
See also
- Ethylene dione (C2O2)
- Carbon suboxide (C3O2)
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