Infrared spectra and structures of aniline+–furan and aniline+–phenol : Preference between π-type and σ-type hydrogen-bonded structures
Infrared photodissociation spectra of aniline+–M (M=thiophene, furan and phenol) are measured in the 2700–3700 cm−1 region and analyzed by density functional theory calculations. Only a structure involving a π-type hydrogen bond is found for aniline+–thiophene. Two structural isomers are identified for aniline+–furan and aniline+–phenol, which have either a π-type or a σ-type hydrogen bond, where an amino proton of aniline+ interacts with the π-electrons or the oxygen atom of the neutral molecules, respectively. The isomer with a σ-type hydrogen bond is more stable for aniline+–phenol, while less stable for aniline+–furan.
Chemical Physics Letters
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Copyright (c) 2003 Elsevier B.V.
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Graduate School of Science
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