Pentacarbon dioxide

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Notion

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Science and technology

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What Wikipedia says

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.

Excerpt from the Wikipedia article “Pentacarbon dioxide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ben Mills and Jynto, Public domain, via Wikimedia Commons.