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EnglishThe rotational spectrum of the ethanol···argon van der Waals complex has been investigated by free-jet absorption millimeter-wave and molecular beams Fourier transform microwave spectroscopy. The spectra of normal and OD isotopomers have been assigned, but only for the complex with trans-ethanol. Ar motions produce vibrational splittings of 1.6662(7) and 1.70(2) MHz for the two isotopic species, respectively. The barrier hindering the tunnelling motion has been evaluated to be about 55 cm-1. The van der Waals structural parameters are: r0(Ar-O)=3.56(1) Å, α0 (∠ArOC) = 94°(1) and τ0 (∠ArOCC)=71°(1). The dissociation energy, as obtained from centrifugal distortion effects, is 2.1 kJ mol-1
| Titolo: | Free and pulsed jet rotational spectra and van der Waals motions of ethanol•••argon |
| Autore/i: | MARIS, ASSIMO; CAMINATI, WALTHER; VELINO, BIAGIO; ANDREWS C. M.; HOWARD B. J. |
| Autore/i Unibo: | |
| Anno: | 2004 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.cplett.2004.09.131 |
| Abstract: | The rotational spectrum of the ethanol···argon van der Waals complex has been investigated by free-jet absorption millimeter-wave and molecular beams Fourier transform microwave spectroscopy. The spectra of normal and OD isotopomers have been assigned, but only for the complex with trans-ethanol. Ar motions produce vibrational splittings of 1.6662(7) and 1.70(2) MHz for the two isotopic species, respectively. The barrier hindering the tunnelling motion has been evaluated to be about 55 cm-1. The van der Waals structural parameters are: r0(Ar-O)=3.56(1) Å, α0 (∠ArOC) = 94°(1) and τ0 (∠ArOCC)=71°(1). The dissociation energy, as obtained from centrifugal distortion effects, is 2.1 kJ mol-1 |
| Data prodotto definitivo in UGOV: | 2005-10-10 11:21:36 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/1039
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