Determination of a High Potential Barrier Hindering Internal Rotation in 2-Methylcyclopentanone and α-Methyl-γ-Butyrolactone by Microwave Fourier Transform Spectroscopy-Reference-Cited by-同舟云学术

Determination of a High Potential Barrier Hindering Internal Rotation in 2-Methylcyclopentanone and α-Methyl-γ-Butyrolactone by Microwave Fourier Transform Spectroscopy

Published:1992-06-01 Issue:6 Volume:47 Page:761-764
ISSN:1865-7109
Container-title:Zeitschrift für Naturforschung A
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Author:

Alonso J. L.¹,Heineking N.²,Dreizler H.²,Heineking N.²,Dreizler H.²

Affiliation:

1. 1Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain/Alexander-von-Humboldt-Stiftung fellow 1990

2. 2Abteilung Chemische Physik im Institut für Physikalische Chemie der Universität Kiel, Kiel, F. R. Germany

Abstract

AbstractThe microwave spectra of α-methyl-γ-butyrolactone and 2-methylcyclopentanone have been reinvestigated using microwave Fourier transform spectroscopy. A-E splittings due to internal rotation of the methyl group have been observed in the ground and several vibrationally excited states for both molecules. From an internal-axis-method analysis of these splittings, values of the methyl group internal rotation barrier of 2.61 kcal mol-1 for α-methyl-γ-butyrolactone and 2.41 kcal mol-1 for 2-methylcyclopentanone have been obtained.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

Link

https://www.degruyter.com/document/doi/10.1515/zna-1992-0607/pdf

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