An Investigation of the Rotamers of Butadiene by High-Resolution Infrared Spectroscopy
A wide-ranging investigation of high-resolution infrared spectra of 1,3-butadiene was undertaken with the prime objective of finding subbands in the rotational structure attributable to the gauche rotamer, from which information about the molecular structure could be derived. A weak band near 750 cm...
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Published in | The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 112; no. 49; pp. 12637 - 12646 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society
11.12.2008
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Subjects | |
Online Access | Get full text |
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Summary: | A wide-ranging investigation of high-resolution infrared spectra of 1,3-butadiene was undertaken with the prime objective of finding subbands in the rotational structure attributable to the gauche rotamer, from which information about the molecular structure could be derived. A weak band near 750 cm−1, which had previously been assigned to the gauche rotamer, has been shown to be a difference band for the trans rotamer. In support of the analysis of this band, the rotational structure, including two hot bands, was analyzed in the C-type band for the ν12(au) mode near 525 cm−1 and in the C-type band near 162 cm−1 for the ν13(au) mode. An unsuccessful attempt was made to extend the analysis of the B-type component of the A/B-type band for ν17(bu) near 3000 cm−1. With the exception of the two weak Q branches at 463.82 and 462.16 cm−1, no new evidence for the gauche rotamer in the gas phase was found. |
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Bibliography: | istex:5BCE777310E6EE5925BC8E888D9C4A42814DA789 ark:/67375/TPS-LSXTSZ6H-M Table S1, GSCDs from ν11 and ν12; Table S2, assigned lines for the ν12 fundamental; Table S3, LSCDs from the first hot band of ν12; Table S4, LSCDs from the second hot band of ν12; Table S5, GSCDs from ν13; Table S6, assigned lines for the ν13 fundamental; Table S7, pooled CDs for the upper state of ν13; Table S8, assigned lines for the first hot band of ν13; Table S9, assigned lines for the second hot band of ν13; Table S10, assigned lines for the first hot band of ν12; Table S11, assigned lines for the second hot band of ν12; Table S12, assigned lines for the ν15(bg) − ν13(au) difference band. This material is available free of charge via the Internet at http://pubs.acs.org. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1089-5639 1520-5215 |
DOI: | 10.1021/jp807677y |