Carbon suboxide polymerizes spontaneously to a red, yellow, or black solid.

Several other ways for synthesis and reactions of carbon suboxide can be found in a review from 1930 by Reyerson.

The suboxide of carbon adopts an unremarkable structure.

Bismuth Trichloride is not soluble in water, it decomposes to the suboxide.

Yet other ideas are that the solid is the same as the polymer of carbon suboxide with oxalic anhydride.

Carbon suboxide was discovered by Brodie in 1873, by passing electric current through carbon dioxide.

By-products include red phosphorus suboxide.

Dicarbon monoxide, covalently bonded, is a product of the photolysis of carbon suboxide.

Inorganic cumulenes include carbon suboxide.

Originally this was thought to be polymeric carbon suboxide, but the formation does not yield any gas byproduct such as carbon dioxide.

Carbon suboxide is used in the preparation of malonates; and as an auxiliary to improve the dye affinity of furs.

Carbon suboxide spontaneously polymerizes at room temperature into a carbon-oxygen polymer, with 3:2 carbon:oxygen atomic ratio.

Disulfur monoxide or sulfur suboxide is an unstable gas being a compound of sulfur and oxygen with formula SO.

Carbon suboxide (CO), an anhydride of malonic anhydride.

Boron suboxide (BO)

It was long considered the hardest known oxide ( 30 GPa Vickers); however, boron suboxide has recently been discovered to be much harder.

Boron suboxide (chemical formula BO) is a solid compound containing six boron atoms and one oxygen atom.

Tellurium monoxide, also known as tellurium suboxide is a chemical compound consisting of tellurium and oxygen.

Other less known oxides include carbon suboxide (CO) and mellitic anhydride (CO).

Carbon also forms three oxides: carbon monoxide, carbon suboxide (CO), and carbon dioxide.

The compound is the third member of the series CO with odd n, the first two members being carbon dioxide (CO) and carbon suboxide (CO).

Other known oxides are the uncommon carbon suboxide, C3O2, the uncommon dicarbon monoxide, C2O and even the exotic carbon trioxide (CO3).

Tellurium suboxide is used in the rewritable data layer of some CD-RW disks and DVD-RW disks.

The discussion if the β-tungsten structure is an allotrope of tungsten or the structure of a tungsten suboxide was long-standing and in 1998 still articles about the discussion were published.

However, carbon can form multiple bonds with other elements, for example carbon dioxide (CO2) or carbon monoxide (CO), or even more weird carbon suboxide OCCCO.