Ethylenetetracarboxylic acid

Ethylenetetracarboxylic acid

Names
IUPAC name 2,3-Dicarboxy-but-2-enedioic acid
Identifiers
CAS Number	4363-44-4 Y
3D model (JSmol)	Interactive image
ChemSpider	11636515 N
PubChem CID	12651152
CompTox Dashboard (EPA)	DTXSID20505724
InChI InChI=1S/C6H4O8/c7-3(8)1(4(9)10)2(5(11)12)6(13)14/h(H,7,8)(H,9,10)(H,11,12)(H,13,14) N Key: AIJZIRPGCQPZSL-UHFFFAOYSA-N N InChI=1/C6H4O8/c7-3(8)1(4(9)10)2(5(11)12)6(13)14/h(H,7,8)(H,9,10)(H,11,12)(H,13,14) Key: AIJZIRPGCQPZSL-UHFFFAOYAE
SMILES O=C(O)/C(C(O)=O)=C(C(O)=O)\C(O)=O
Properties
Chemical formula	C6H4O8
Molar mass	204.090 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Ethylenetetracarboxylic acid is an organic compound with formula C
₆H
₄O
₈, or (HO(OC)-)₂C=C(-(CO)OH)₂.

By removal of four protons, the acid yields the anion C
₆O⁴⁻
₈, ethylenetetracarboxylate, which is one of the oxocarbon anions (consisting solely of oxygen and carbon. By loss of 1 through 3 protons it forms the anions C
₆H
₃O⁻
₈, C
₆H
₂O²⁻
₈, and C
₆HO³⁻
₈, called respectively trihydrogen-, dihydrogen-, and hydrogenethylenetetracarboxylate. The same names are used for the corresponding esters.

The acid can be obtained by hydrolysis of , which in turn can be obtained from with sodium iodide.^[1]

Ethylenetetracarboxylic dianhydride, a twofold acid anhydride of this compound, can be formed by direct dehydration at high temperature.^[2]

References[]