noun
carbon suboxide
Chemical compound with formula C₃O₂; a colorless gas with a pungent odor, used in organic synthesis.
次酸化炭素は、マロン酸の脱水反応で合成される。
Carbon suboxide is synthesized by the dehydration of malonic acid.
From 次 (hypo-/sub-) + 酸化 (oxidation) + 炭素 (carbon), reflecting its lower oxidation state relative to carbon dioxide.