Tags: Chemical Compound, Chemical Substance.
2-(Dicyanomethylene)croconate is a divalent anion with chemical formula C8N2O2−4 or ((N≡C-)2C=)(C5O4)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 one oxygen atom by a dicyanomethylene group =C(-C≡N)2.The anion was synthesized and characterized by A. Fatiadi in 1980 by hydrolysis of croconate violet treated with potassium hydroxide. It gives an orange solution in water.
