Article detail · 2004
Photochemistry and Vibrational Spectroscopy of the Trans and Cis Conformers of Acetic Acid in Solid Ar
Journal
The Journal of Physical Chemistry A- Year
- 2004
- Type
- article
Data source split
- YÖKSİS venue The Journal of Physical Chemistry A
- OpenAlex OpenAlex enrichment (abstract, citations, topics)
Abstract
OpenAlex · English
Acetic acid monomer has two stable geometries, the cis and trans conformers. The high-energy cis conformer has been recently detected experimentally for the first time [Maçôas et al. J. Am. Chem. Soc. 2003, 125, 16188]. The cis conformer can be produced in low-temperature rare-gas matrixes upon vibrational excitation of the ground-state trans conformer. Fast tunneling from cis - to trans -acetic acid takes place even at the lowest working temperatures (8 K), limiting the time available to study the high-energy form. Deuteration of the hydroxyl group reduces the tunneling rate by approximately 4 orders of magnitude, increasing accordingly the lifetime of the unstable conformer and its available concentration. In this work, we present a detailed analysis of the vibrational spectra of the cis form of four acetic acid isotopologues (CH 3 COOH, CH 3 COOD, CD 3 COOH and CD 3 COOD). Photolysis (193 nm) of the trans and cis forms of the perdeuterated compound was performed to evaluate the possible conformational dependence of photodissociation of acetic acid. However, no evidence of conformer specific photodissociation was found. The UV photolysis of the matrix-isolated acetic acid reveals very different products from the gas phase. Methanol complexed with carbon monoxide is the major product of photolysis of acetic acid isolated in Ar matrixes whereas it has never been observed as a photolysis product in the gas phase.
Topics
Citations
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79 citations
OpenAlex cited_by_count (cache / database)
18 publications in the local catalog that cite this work (OpenAlex reference match; not the full global list).
- Formic and acetic acids in a nitrogen matrix: Enhanced stability of the higher-energy conformer 2010
- Rotational isomerism of acetic acid isolated in rare-gas matrices:: Effect of medium and isotopic substitution on IR-induced isomerization quantum yield and cis→trans tunneling rate 2004
- Internal rotation in propionic acid: Near-infrared-induced isomerization in solid argon 2005
- Rotational isomerization of small carboxylic acids isolated in argon matrices: Tunnelling and quantum yields for the photoinduced processes 2005
- IR-induced and tunneling reactions in cryogenic matrices: the (incomplete) story of a successful endeavor 2022
- S-H rotamerization via tunneling in a thiol form of thioacetamide 2019
- The first experimental observation of the higher-energy trans conformer of trifluoroacetic acid 2016
- Entropy effects in conformational distribution and conformationally dependent UV-induced photolysis of serine monomer isolated in solid argon 2006
- Selective conformational control by excitation of NH imino vibrational antennas 2019
- Structural Aspects of the Ortho Chloro- and Fluoro- Substituted Benzoic Acids: Implications on Chemical Properties 2020