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Mid‐IR Spectroscopy and Structural Features of Protonated Carbonic Acid in the Gas Phase
Author(s) -
Chiavarino Barbara,
Crestoni Maria Elisa,
Fornarini Simonetta,
Lanucara Francesco,
Lemaire Joel,
Maitre Philippe
Publication year - 2009
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800795
Subject(s) - protonation , carbonic acid , chemistry , deprotonation , dissociation (chemistry) , infrared spectroscopy , spectroscopy , gas phase , infrared multiphoton dissociation , proton affinity , ion , photochemistry , analytical chemistry (journal) , organic chemistry , quantum mechanics , physics
An anti trihydroxycarbenium ion is revealed to be the gas‐phase structure of protonated carbonic acid by IR multiple‐photon dissociation spectroscopy (see picture for calculated structure and comparison of experimental and computed spectra). Deprotonation yields anti ‐H 2 CO 3 with a nominal gas‐phase basicity of 724 kJ mol −1 .