I have searched all over the internet and I have found no specific answer. I just want to know if C4O5 is possible and what would it be called.
2 Answers
Tetracarbon pentoxide, $\ce{C4O5}$, does not appear to be known, but Wikipedia reports what has become a surprisingly large variety of oxocarbons. They include simple carbon monoxide and carbon dioxide, various extended linear structures, single and multiple rings, oligomers and polymers, even fullerene oxides. Some are surprisingly stable: mellitic anhydride, $\ce{C_{12}O9}$, can be melted at 161°C, and the powerful pi acceptor $\ce{C_{10}O8}$ is stable in dry air up to 140°C.
$\ce{C4O5}$ can be found in a Chinese patent art(Ref. 1). It is called Oxolane-2,3,4,5-tetrone both in the patent and PubChem. In the patent, $\ce{C4O5}$ is shown as compound 2 and appears to be a compound which undergoes further reaction with itself eventually giving a desired product.
A google translation of the relative portion of the patent, from Chinese to English follows:
Route 1, the synthetic route is shown below, 2,3-dioxosuccinic acid (1) is heated in acetic anhydride solvent and passed through the ring reaction to obtain furan 2,3,4,5-tetraketone (2), compound (2) ) React with alkylamine in THF and thionyl chloride to obtain pyrrolidine-2,3,4,5-tetraketone (3) containing solubilizing alkyl chain[...]
Clearly, compound 2 was synthesized and it further reacted with itself. $\ce{C4O5}$, although obscure, does exist.
References:
- CN108976392 - "Conjugated polymer photoelectric material containing quinoxaline imide condensed ring and application thereof" (link)
+1
This seems like a reasonable question and has an interesting answer; I don't understand the aggressive down voting and insta-closing, or how that benefits the site. $\endgroup$