IR Spectra of Protonated Carbonic Acid and Its Isomeric H₃O⁺⋅CO₂ Complex

The authors of this Communication wish to correct a remark in their introductory paragraph: “There have been several unsuccessful attempts to generate and characterize gas-phase H₂CO₃ by heating solid H₂CO₃³ or NH₄HCO₃.¹²” This statement is incorrect and misleading, and the authors apologize for their oversight. The sentence should read: “Although there have been several successful attempts to generate and identify gas-phase H₂CO₃ by heating solid H₂CO₃³ or NH₄HCO₃,¹² there is still a lack of detailed experimental information on its structural, spectroscopic, and thermochemical properties.”