Potassium hydrogenacetylenedicarboxylate

Potassium hydrogenacetylenedicarboxylate is a potassium salt with chemical formula KC₄HO₄ or K⁺·HC₄O₄⁻, often abbreviated as KHadc. It is often called potassium hydrogen acetylenedicarboxylate or monopotassium acetylenedicarboxylate.

The salt can be obtained from acetylenedicarboxylic acid and is a common laboratory starting material for the synthesis of other derivatives of that acid. In the crystalline form, the hydrogenacetylenedicarboxylate anions HC₄O₄⁻s are joined into linear chains by uncommonly short hydrogen bonds. ^[1][2]

See also

• Potassium bicarbonate
• Potassium hydrogenoxalate

References

1. Ivan Leban and Ljubo Golić (1973), Crystal Structures of the Acid Salts of Some Dibasic Acids. Part VII. An X-Ray Study of Potassium Hydrogen Acetylenedicarboxylate: the α-Form. J. Chem. Soc., Perkin Trans. 2, , 703–705, doi:10.1039/P29730000703
2. Keisuke Miyakubo (1994). Nuclear magnetic resonance studies of dynamicals structure of one-dimensional hyrogen-bonded system in the acid salts of some dicarboxylic acids. Ph.D. Thesis, Osaka University.