Rotational isomerism, barrier to internal rotation and electric dipole moment of acrylic acid by microwave spectroscopy

1974 ◽  
Vol 70 ◽  
pp. 113 ◽  
Author(s):  
Keith Bolton ◽  
David G. Lister ◽  
John Sheridan
Keyword(s):  
Dipole Moment ◽  
Acrylic Acid ◽  
Internal Rotation ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Microwave Spectroscopy ◽  
Rotational Isomerism

The Microwave Spectrum of 4-Methylisoxazole: 14N Nuclear Quadrupole Coupling, Methyl Internal Rotation and Electric Dipole Moment

1987 ◽  
Vol 42 (5) ◽  
pp. 501-506 ◽  
Author(s):  
W. Jäger ◽  
H. Dreizler ◽  
H. Mäder ◽  
J. Sheridan ◽  
C. T. Walls
Keyword(s):  
Dipole Moment ◽  
Internal Rotation ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Microwave Spectrum ◽  
Centrifugal Distortion ◽  
Frequency Range ◽  
Principal Axes ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

The microwave spectrum of 4-methylisoxazole has been investigated in the frequency range from 8 to 40 GHz, employing both Stark and Fourier transform spectroscopy. We present the results from a 14N quadrupole hyperfine structure, a fourth-order centrifugal distortion and an IAM methyl internal rotation analysis. The components of the electric dipole moment with respect to the principal axes of inertia have been obtained from the Stark splittings of some rotational lines.

Rotationsspektrum von BaO / Rotational Spectrum of BaO

1974 ◽  
Vol 29 (11) ◽  
pp. 1692-1694 ◽  
Author(s):  
E. Tiemann ◽  
M. Bojasehewsky ◽  
Ch. Sauter-Servaes ◽  
T. Törring
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Microwave Spectroscopy ◽  
Rotational Spectrum ◽  
Molecular Constants ◽  
Order Of Magnitude

With the new saturation modulation the rotational spectrum of BaO was measured. The accuracy of the derived molecular constants is about an order of magnitude higher than in previous studies and some discrepancies are removed. It was demonstrated that measurements of the electric dipole moment are possible with microwave spectroscopy up to temperatures of 2000 K.

Sign in / Sign up

Export Citation Format

Share Document