Internal rotation of the methyl group in the radical cation of dimethyl ether

1990 ◽  
Vol 92 (8) ◽  
pp. 4749-4758 ◽  
Author(s):  
Michio Matsushita ◽  
Takamasa Momose ◽  
Tadamasa Shida
Keyword(s):  
Internal Rotation ◽  
Radical Cation ◽  
Dimethyl Ether ◽  
Methyl Group

Mikrowellenspektrum und Struktur von Fluortribromsilan und Methyltribromsilan

1968 ◽  
Vol 23 (11) ◽  
pp. 1819-1821 ◽  
Author(s):  
M. Mitzlaff ◽  
R. Holm ◽  
H. Hartmann
Keyword(s):  
Least Squares ◽  
Internal Rotation ◽  
Kcal Mole ◽  
Rotational Constants ◽  
Methyl Group ◽  
Microwave Spectra ◽  
Group A

The microwave spectra of SiFBr3 and CH3SiBr have been investigated in the region from 30 to 40 GHz. Assuming reasonable values for dSi-F, dSi-C and the methyl group a least squares analysis of the rotational constants yieldsdSi-Br ≮Br—Si—BrSiFBr3 (2,171 ± 0,001) A (111,36 ± 0,15)°,CH3SiBr3 (2,175±0,001) A (111,09±0,15)°.A barrier to internal rotation of about 1 kcal/mole is estimated by the intensity method.

Acetonen-radical cation internal rotation spectrum: The torsional potential surface

2000 ◽  
Vol 112 (6) ◽  
pp. 2762-2768 ◽  
Author(s):  
Dana A. Shea ◽  
Lionel Goodman ◽  
Michael G. White
Keyword(s):  
Internal Rotation ◽  
Radical Cation ◽  
Potential Surface ◽  
Torsional Potential ◽  
Rotation Spectrum

Internal Rotation of the Methyl Group in them-Tolunitrile−Rare Gas Complexes

1996 ◽  
Vol 100 (24) ◽  
pp. 10037-10040 ◽  
Author(s):  
Masao Takayanagi ◽  
Ichiro Hanazaki
Keyword(s):  
Internal Rotation ◽  
Rare Gas ◽  
Methyl Group

EPR spectra and structure of bis-chlorinated dimethyl ether radical cation, CH2ClOCH2Cl+

2002 ◽  
Vol 4 (12) ◽  
pp. 2530-2533 ◽  
Author(s):  
Yoshiteru Itagaki ◽  
Peng Wang ◽  
Masaru Shiotani ◽  
Akinori Hasegawa
Keyword(s):  
Radical Cation ◽  
Dimethyl Ether ◽  
Epr Spectra

Millimeter-Wave Spectrum of Ethyl Acetylene Centrifugal Distortion, Coriolis Interaction and Internal Rotation

1983 ◽  
Vol 38 (4) ◽  
pp. 447-451 ◽  
Author(s):  
J. Demaison ◽  
D. Boucher ◽  
J. Burie ◽  
A. Dubrulle
Keyword(s):  
Excited State ◽  
Internal Rotation ◽  
Plane Deformation ◽  
Wave Spectrum ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Coriolis Interaction ◽  
Methyl Group ◽  
First Excited State ◽  
Methyl Torsion

The rotational spectrum of ethyl acetylene has been investigated between 70 and 320 GHz. A Coriolis interaction has been found between the first excited state of the methyl torsion and the C - C = C in plane deformation. Splittings of transitions in the first excited torsional state show that the barrier hindering internal rotation of the methyl group amounts to 3271 cal/mole.

High Resolution Microwave Spectroscopy of Ethyl Vinyl Ether: Accurate Determination of the Methyl Top Internal Rotation Barrier

2000 ◽  
Vol 55 (5) ◽  
pp. 481-485 ◽  
Author(s):  
H. Dreizler ◽  
N. Hansen
Keyword(s):  
Internal Rotation ◽  
Vinyl Ether ◽  
Accurate Determination ◽  
Ethyl Vinyl Ether ◽  
Ethyl Vinyl ◽  
Methyl Group ◽  
Rotational Spectra ◽  
Internal Rotation Barrier ◽  
In Trans

Abstract We have performed an investigation of the internal rotation of the methyl group in trans-cis ethyl vinyl ether by using molecular beam-Fourier transform Microwave (MB-FTMW) spectroscopy. Rotational spectra (up to J = 20) were recorded in the frequency region 4-19 GHz. Due to the internal rotation of the methyl group, some rotational transitions were split and the torsional barrier could be determined to V3 (CH3) = 1074.4(4) cm-1 .

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