IIn the paper by Sugiyama [Acta Cryst. (2020), E76, 742–746], there is an error in the chemical names of the title compounds. The chemical names of the title compounds in the paper by Sugiyama (2012) are incorrect. The title should read ‘Hydrogen-bonding patterns in pyridinium 2,2-bis(4-carboxyphenyl) hexafluoropropane and ethylenediammonium salt crystals’, and ‘2,2-bis(4-methylphenyl)hexafluoropropane’ should be ‘2,2-bis(4-carboxyphenyl)hexafluoropropane’ throughout. The systematic names of the compounds in the Abstract are correct.
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