Isotopieeffekte im Rotationsspektrum des SiS / lsotopic Effects in the Rotational Spectrum of SiS

1972 ◽  
Vol 27 (11) ◽  
pp. 1566-1570 ◽  
Author(s):  
E. Tiemann ◽  
E. Renwanz ◽  
J. Hoeft ◽  
T. Törring
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Rotational Constant ◽  
Higher Order ◽  
Rotational Spectrum ◽  
Oppenheimer Approximation ◽  
Isotopic Effects

Abstract Corrections resulting from the breakdown of the Born-Oppenheimer approximation were obtained by a detailed discussion of the higher order isotopic effects of the rotational constant Y01 . This analysis yields the sign of the electric dipole moment to be positive (+SiS-) and the sign of the molecular gJ-value to be negative. The magnitude of the adiabatic correction was evaluated.

Adiabatische Korrektur der Born-Oppenheimer-Näherung beim GeS und GeSe / Adiabatic Correction of the Born-Oppenheimer Approximation for GeS and GeSe

1976 ◽  
Vol 31 (3-4) ◽  
pp. 374-380 ◽  
Author(s):  
W. U. Stieda ◽  
E. Tiemann ◽  
T. Törring ◽  
J. Hoeft
Keyword(s):  
Dipole Moment ◽  
High Precision ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Rotational Constant ◽  
Frequency Range ◽  
Rotational Spectra ◽  
Oppenheimer Approximation

Abstract The rotational spectra of GeS and GeSe were measured in the frequency range of 66 GHz to 110 GHz with high precision. The breakdown of the Born-Oppenheimer approximation was observed for the rotational constant yol. With the known molecular 37-factor and the electric dipole moment the adiabatic part of the Born-Oppenheimer correction can be extracted from the primary observa-tion on y01. The adiabatic correction is very similar in both molecules but differs from the results in the earlier measurements on PbS.

Rotational Spectrum , Electric Dipole Moment, Quadrupole Coupling , and Partial r0- Structure of 3 -Cyanothiophene

1977 ◽  
Vol 32 (8) ◽  
pp. 890-896 ◽  
Author(s):  
J. Wiese ◽  
D. H. Sutter
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Stark Effect ◽  
Quadrupole Coupling Constant ◽  
Abundant Species ◽  
Rotational Spectrum ◽  
Quadrupole Coupling ◽  
Centrifugal Distortion Constants ◽  
Ring Distortion

Abstract The microwave rotational spectrum of the most abundant species of 3-Cyanothiophene was investigated for the ground vibrational state. Rotational constants and centrifugal distortion constants are given. The electric dipole moment components μa and μb and the 14N-quadrupole coupling constant X + = X bb + X cc were determined from the Stark-effect splittings and hfs-splittings respectively. The experimental results are compared to CNDO/2 calculations and are discussed with reference to ring distortion.

Pure Rotational Spectrum and Electric Dipole Moment of CH3D

1969 ◽  
Vol 51 (11) ◽  
pp. 4873-4880 ◽  
Author(s):  
Irving Ozier ◽  
W. Ho ◽  
George Birnbaum
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Rotational Spectrum

Rotational Spectrum, Structure, and Electric Dipole Moment of Bis(difluoromethyl) Ether

1998 ◽  
Vol 192 (2) ◽  
pp. 441-448 ◽  
Author(s):  
R.D. Suenram ◽  
F.J. Lovas ◽  
A.R. Hight Walker ◽  
D.A. Dixon
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Rotational Spectrum ◽  
Spectrum Structure

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.

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