High Quality Content by WIKIPEDIA articles! 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 oxocarbon anion C5O2? 5 through the replacement of two oxygen atoms by dicyanomethylene groups =C(-C?N)2.

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