Girish Mahajan (Editor)

Benzoquinonetetracarboxylic acid

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Formula
  
C10H4O10

Molar mass
  
284.14 g/mol

Benzoquinonetetracarboxylic acid

In chemistry, 1,4-benzoquinonetetracarboxylic acid is an organic compound with formula C
10
H
4
O
10
, or (C6O2)(-(CO)OH)4, which can be viewed as deriving from para-benzoquinone C
6
H
4
O
2
through replacement of the four hydrogen atoms by carboxyl functional groups -(CO)OH.

By removal of four protons, the acid is expected to yield the anion C
10
O4−
10
, benzoquinonetetracarboxylate, 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
10
H
3
O
10
, C
10
H
2
O2−
10
, and C
10
H
1
O3−
10
, called respectively trihydrogen-, dihydrogen-, and hydrogenbenzoquinonetetracarboxylate. The same names are used for the corresponding esters.

Removal of two water molecules gives the compound benzoquinonetetracarboxylic dianhydride, C
10
O
8
, one of the oxides of carbon.

The acid can be obtained by from durene (1,2,4,5-tetramethylbenzene) via dinitropyromellitic and diaminopyromellitic acids.

References

Benzoquinonetetracarboxylic acid Wikipedia