Organic salts formed by oxocarbon anions and tetraalkylammonium cations.

Supramolecular arrangement mainly stabilized by hydrogen bonds.

Squarate salts are stabilized in the solid by the presence of squaric acid and hydrogen squarate.

Croconate salt presents very strong hydrogen bonds with all the water molecules in the structure.

Raman and infrared techniques were used to characterize the main marker bands of the oxocarbons.