| 2-(Dicyanomethylene)croconate | |
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2-(Dicyanomethylene)croconate |
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| Identifiers | |
| ChemSpider | 26234929 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | C8N2O4 |
| Molar mass | 188.0966 g mol-1 |
| Exact mass | 187.985806498 g mol-1 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
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 syntesized and characterized by A. Fatiadi in 1980, by hydrolysis of croconate violet treated with potassium hydroxide.[1] It gives an orange solution in water.