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Infrared Spectra of Monohydrogenated Aniline, ortho- and para-HC6H5NH2, Generated in Solid para-Hydrogen
| Title: | Infrared Spectra of Monohydrogenated Aniline, ortho- and para-HC6H5NH2, Generated in Solid para-Hydrogen |
| Authors: | Tsuge, Masashi Browse this author | | Chen, Yu-Hsuan Browse this author | | Lee, Yuan-Pern Browse this author |
| Issue Date: | 17-Sep-2020 |
| Publisher: | American Chemical Society |
| Journal Title: | Journal of physical chemistry A |
| Volume: | 124 |
| Issue: | 37 |
| Start Page: | 7500 |
| End Page: | 7510 |
| Publisher DOI: | 10.1021/acs.jpca.0c06079 |
| Abstract: | The isomers of monohydrogenated aniline (HC6H5NH2) are regarded as important intermediates in reduction reactions of aniline, but their spectral identification has been limited to electron paramagnetic resonance in an adamantane matrix. We report here infrared (IR) spectra of two least-energy isomers of HC6H5NH2, produced on electron bombardment during the deposition of a matrix of aniline and para-hydrogen at 3.2 K. The intensities of IR lines of HC6H5NH2 increased during maintenance of the electron-bombarded matrix in darkness for a prolonged period because of the neutralization of protonated aniline, H+C6H5NH2, by trapped electrons and further reactions between aniline and the unreacted hydrogen atoms that were produced during electron bombardment. The observed lines were grouped according to their behaviors on secondary photolysis with light at 520, 465, and 375 nm. On comparison of experimental spectra with quantum chemically predicted spectra for four possible isomers of HC6H5NH2, lines in one group were assigned to the most stable ortho-HC6H5NH2 and those in the other group were assigned to the second-most stable para-HC6H5NH2. Their photolytic behaviors at varied wavelengths are consistent with predicted ultraviolet absorption bands. The mechanisms of formation of these isomers are discussed according to semiquantitative analysis. |
| Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry A, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.jpca.0c06079. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82682 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 柘植 雅士
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