Notizen: A Contribution to the Microwave Spectrum of Dimethylether-D6 in Excited Torsional States

1975 ◽  
Vol 30 (12) ◽  
pp. 1782 ◽  
Author(s):  
H. Lutz ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Microwave Spectrum ◽  
Potential Parameter ◽  
Rotational Transitions

Abstract A number of rotational transitions of (CD3)2O in the excited torsional states ν̃=l1 and ν̃=l2 were recorded in the region from 8.0 to 40.0 GHz. The potential parameter V3 and the angle α between the axis of internal rotation and the b-axis were fitted to line splittings. The results are V3 = 2545 cal/mole and α = 60.8°.

The Microwave Spectrum of trans-2,3-Dimethyloxirane in Torsional Excited States

1996 ◽  
Vol 51 (8) ◽  
pp. 923-932 ◽  
Author(s):  
H. Hartwig ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Potential Function ◽  
Excited States ◽  
Ground State ◽  
Microwave Spectrum ◽  
Rotation Axes ◽  
Direction Cosines ◽  
Rotational Transitions ◽  
Good Agreement

Abstract The microwave spectrum of trans-2,3-dimethyloxirane (CH3CHOCHCH3) in the excited tor-sional states υ17 = 1 and υ33 = 1 has been measured in the range from 8 to 26 GHz and assigned. An analysis of internal rotation splittings of the observed rotational transitions was performed using the internal axis method (or "combined axis method") with a newly developed program accounting for the top-top coupling. The threefold hindering potential V3 and the direction cosines λ g,i of the internal rotation axes i with respect to the principal inertia axes g are in a good agreement with the ground state values. Additionally, the sixfold hindering parameter V6 was found to be - 0.2600(12) kJ/mol. The value of the parameter V′12 describing the top-top coupling in the potential function (via V′12 sin 3 τ1 sin 3 τ2), was determined to -0.4240(6) kJ/mol.

ChemInform Abstract: THE MICROWAVE SPECTRUM, STRUCTURE, DIPOLE MOMENT, AND INTERNAL ROTATION OF THE METHYL ISOCYANIDE-BORANE COMPLEX

1977 ◽  
Vol 8 (21) ◽  
pp. no-no
Author(s):  
J. F. JUN. STEVENS ◽  
J. W. BEVAN ◽  
R. F. JUN. CURL ◽  
R. A. GEANANGEL ◽  
M. G. HU
Keyword(s):  
Dipole Moment ◽  
Internal Rotation ◽  
Microwave Spectrum ◽  
Methyl Isocyanide ◽  
Spectrum Structure

Facile Formation of Acetic Sulfuric Anhydride: Microwave Spectrum, Internal Rotation, and Theoretical Calculations

2017 ◽  
Vol 121 (30) ◽  
pp. 5659-5664 ◽  
Author(s):  
Anna K. Huff ◽  
Rebecca B. Mackenzie ◽  
C.J. Smith ◽  
Kenneth R. Leopold
Keyword(s):  
Internal Rotation ◽  
Theoretical Calculations ◽  
Microwave Spectrum ◽  
Sulfuric Anhydride
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