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https://hdl.handle.net/2440/4544
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Type: | Journal article |
Title: | Jet-cooled multiphoton ionization spectroscopy of the iso-butanal 3s←n Rydberg transition |
Other Titles: | Jet-cooled multiphoton ionization spectroscopy of the iso-butanal 3s <- n Rydberg transition |
Author: | Metha, G. Buntine, M. Bradley, A. Morrison, R. |
Citation: | Journal of Molecular Spectroscopy, 2001; 206(1):73-82 |
Publisher: | Academic Press Inc |
Issue Date: | 2001 |
ISSN: | 0022-2852 |
Statement of Responsibility: | G. F. Metha, M. A. Buntine, A. J. Bradley and R. J. S. Morrison |
Abstract: | We report the results of a study on the vibrational structure in the (n, 3s) Rydberg state of iso-butanal, carried out via 2+1 multiphoton ionization spectroscopy in a supersonic expansion. Spectra were recorded for both the normal species, (CH₃)₂CHCHO, and the deuterated isotopomer, (CH₃)₂CDCHO. The spectra show a complicated vibrational pattern attributable to the gauche (C1) conformer which is known to be 250 cm⁻¹ lower in energy than the more symmetric trans (Cs) conformer. The spectra are dominated by the low-frequency formyl torsion which appears in combination with the two methyl torsions (in-phase and out-of-phase) and with several skeletal modes. Vibrational assignments have been aided by ab initio calculations of the (n, 3s) Rydberg state. |
Keywords: | Multiphoton ionization iso-butanal (2-methyl propanal) alkyl aldehydes Rydberg transition conformer |
Rights: | Copyright © 2001 Academic Press. All rights reserved. |
DOI: | 10.1006/jmsp.2000.8293 |
Published version: | http://dx.doi.org/10.1006/jmsp.2000.8293 |
Appears in Collections: | Aurora harvest 6 Chemistry publications Environment Institute publications |
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