Carbon suboxide
Carbon suboxide, or tricarbon dioxide, is a chemical compound. It is one of the metastable carbon oxides.
Discovery
Benjamin Brodie discovered carbon suboxide in 1873 by passing electricity through carbon monoxide. He claimed that this substance was only one of many "oxycarbons", a family including other chemicals with the formula C
nO
n-1, but only C
3O
2 has been made.[1][2]
In 1891 Marcellin Berthelot noticed that heating pure carbon monoxide to around 550 °C creates small amounts of carbon dioxide but no carbon at all. He assumed that a carbon-rich oxide was created instead. He called this substance "suboxide". He thought that it was the same product obtained by an electric arc and proposed the formula C
2O.[3] Otto Diels later claimed that the more organic names dicarbonyl methane and dioxalene were correct as well.
Characteristics
Carbon suboxide is commonly described as an oily liquid or gas at room temperature with a very noxious smell.[4]
Carbon suboxide spontaneously polymerizes to a red, yellow, or black solid. The structure is postulated to be poly(α-pyrone), similar to the structure in 2-Pyrone (α-pyrone).[5][6] In 1969, it was hypothesized that carbon suboxide caused the color of Mars's surface; the Viking probes later disproved this idea.[7]
Uses
Carbon suboxide is used to make malonates and to improve the affinity of leather dyes.
Carbon Suboxide Media
Those are 6- or 8-ring macrocyclic polymers of carbon suboxide that were found in living organisms. They are acting as an endogenous digoxin-like Na+/K+-ATP-ase and Ca-dependent ATP-ase inhibitors, endogenous natriuretics, antioxidants and antihypertensives
dative contributor the structure of C3O2
References
- ↑ Note on the Synthesis of Marsh-Gas and Formic Acid, and on the Electric Decomposition of Carbonic Oxide. Proc. R. Soc. Lond. 21 (139–147) (1873). p. 245–247. doi:10.1098/rspl.1872.0052.
- ↑ Ueber eine Synthese von Sumpfgas und Ameisensäure und die electrische Zersetzung des Kohlenoxyds. Liebigs Ann. 169 (1–2) (1873). p. 270–271. doi:10.1002/jlac.18731690119.
- ↑ Action de la chaleur sur l'oxyde de carbone. Annales de Chimie et de Physique 6 (24) (1891). p. 126–132. Retrieved 21 Feb 2007.
- ↑ Carbon Suboxide. Chem. Rev. 7 (4) (1930). p. 479–492. doi:10.1021/cr60028a002.
- ↑ Analysis of Poly(carbon suboxide) by Small-Angle X-ray Scattering. Angewandte Chemie International Edition 43 (43) (2004). p. 5843–5846. doi:10.1002/anie.200460263.
- ↑ The Structure of Carbon Suboxide, C3O2, in the Solid State. Z. Anorg. Allg. Chem. 627 (1) (2001). p. 73–76. doi:<73::AID-ZAAC73>3.0.CO;2-A 10.1002/1521-3749(200101)627:1<73::AID-ZAAC73>3.0.CO;2-A.
- ↑ Mars: Is the Surface Colored by Carbon Suboxide?. Science 166 (3909) (1969). p. 1141–1142. doi:10.1126/science.166.3909.1141.