Microwave spectrum of the32S17O radical. Magnetic hyperfine structure and quadrupole coupling constants

1982 ◽  
Vol 1 (5) ◽  
pp. 648-654 ◽  
Author(s):  
G. Cazzoli ◽  
C. Degli Esposti ◽  
P. G. Favero
Keyword(s):  
Hyperfine Structure ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Magnetic Hyperfine ◽  
Quadrupole Coupling ◽  
Magnetic Hyperfine Structure

14N Nuclear Quadrupole Hyperfine Structure in the Microwave Spectrum of Methyl Azide, CH3N3

1989 ◽  
Vol 44 (7) ◽  
pp. 669-674 ◽  
Author(s):  
N. Heineking ◽  
M.C.L. Gerry
Keyword(s):  
Hyperfine Structure ◽  
Ab Initio Calculation ◽  
Structural Information ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Rotational Spectra ◽  
Isotopic Species ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole ◽  
First Time

Abstract The 14N nuclear quadrupole hyperfine structure in the rotational spectra of three isotopic species of methyl azide, CH3 14N3, CH3 15N14N2, and CH3 14N2 15N, has been resolved using microwave Fourier transform spectroscopy. The quadrupole coupling constants of 14N at all three positions have been evaluated and are compared with those from an ab initio calculation in the literature.Since the spectra of the substituted species have been obtained for the first time, they have provided new structural information: the rotational constants are consistent with a structure in which the NNN chain is slightly bent.

The Microwave Spectrum and Nuclear Quadrupole Coupling Constants of HNC17O

1989 ◽  
Vol 44 (12) ◽  
pp. 1187-1190
Author(s):  
M. C. L Gerry ◽  
S. J. Howard ◽  
N. Heineking ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Ab Initio ◽  
Hyperfine Structure ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Centrifugal Distortion ◽  
Ab Initio Prediction ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole ◽  
First Time

Abstract The microwave spectrum of HNC17O is reported for the first time. The measurements were made with both Stark modulated and microwave Fourier transform spectrometers. The 17O and 14N quadrupole hyperfine structure has been resolved and rotational, centrifugal distortion and 17O and 14N quadrupole coupling constants have been evaluated. The 17O coupling constants are compared with those from an ab initio prediction.

Das Rotationsspektrum des IBr / Rotational Spectrum of IBr

1975 ◽  
Vol 30 (8) ◽  
pp. 986-991 ◽  
Author(s):  
E. Tiemann ◽  
Th. Möller
Keyword(s):  
Hyperfine Structure ◽  
Rotational Transition ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Vibrational States ◽  
Hyperfine Parameters ◽  
Rotational Constants ◽  
Quadrupole Coupling

AbstractThe microwave spectrum of IBr was measured in the low rotational transition J = 3 ← 2 in order to resolve the hyperfine structure as completely as possible. Rotational constants and quadrupole coupling constants were derived for both nuclei. The observation of the rotational spectrum in different vibrational states yields the vibrational dependence of the rotational constants as well as of the hyperfine parameters. The Dunham potential coefficients a0, a1, a2, a3 are given.

Hyperfine Structure in the Microwave Spectrum of Trifluorophosphine Oxide and Sulfide

1987 ◽  
Vol 42 (12) ◽  
pp. 1415-1417 ◽  
Author(s):  
Eric R. Bittner ◽  
José Matos ◽  
Kurt W. Hillig ◽  
Robert L. Kuczkowski
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Microwave Spectroscopy ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Phosphine Oxides ◽  
Coupling Constant ◽  
Microwave Spectra ◽  
Quadrupole Coupling ◽  
Fourier Transform Microwave Spectroscopy

The microwave spectra of 17OPF3 and 33SPF3 were investigated by Fourier transform microwave spectroscopy and the 17O and 33S quadrupole coupling constants were determined. The 17O coupling constant is compared with several others from related phosphine oxides to characterize the π-bonding in these systems.

Investigation of the Microwave Spectrum of Cyclopropyl Isocyanate. An Example for the Failure of Centrifugal Distortion Theory

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1175-1184 ◽  
Author(s):  
C. Heldmann ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Ground State ◽  
Microwave Spectrum ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Vibrational Ground State ◽  
Quadrupole Coupling

Abstract The vibrational ground state microwave spectrum of cyclopropyl isocyanate was investigated in the region from 8.4 to 40 GHz by microwave Fourier transform (MWFT) spectroscopy. The quadru-pole hyperfine structure was resolved and assigned. The quadrupole coupling constants are given. With respect to the data given in the literature up to now, this work led to a more profound description of the pure rotational spectrum. Furthermore, some interesting and surprising results concerning the effect of centrifugal distortion are presented. Compared to hitherto existing investi-gations, these results indicate a more complicated conformational behaviour of cyclopropyl iso-cyanate.

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