dicyanomethylene
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Croconate violet — or 1,3 bis(dicyanomethylene)croconate is a divalent anion with chemical formula C11N4O2− 3 or ((N≡C )2C=)2(C5O3)2−. It is one of the pseudo oxocarbon anions, as it can be described as a derivative of the croconate … Wikipedia
Croconate blue — or 1,2,3 tris(dicyanomethylene)croconate is a divalent anion with chemical formula C14N6O2− 2 or ((N≡C )2C=)3(C5O2)2−. It is one of the pseudo oxocarbon anions, as it can be described as a derivative of the croconate … Wikipedia
Cumulene — Not to be confused with cumene. A cumulene is a chemical compound with two or more cumulative (consecutive) double bonds, for example butatriene (which is also just called cumulene), H2C=C=C=CH2. Unlike alkanes and most alkenes, cumulenes tend to … Wikipedia
Cumulène — Un cumulène est un composé organique avec trois ou plus doubles liaisons consécutives (cumulatives), par exemple le butatriène, H2C=C=C=CH2 qui, comme étant le plus petit des cumulènes, est aussi appelé lui même cumulène. Contrairement aux… … Wikipédia en Français
