A Molecular Beam Fourier Transform Microwave Spectrometer in the Range 26.5 to 40 GHz. Tests of Performance and Analysis of the D-and 14N-Hyperfine Structure of Methylcyanide-d1

1994 ◽  
Vol 49 (3) ◽  
pp. 490-496 ◽  
Author(s):  
I. Merke ◽  
H. . Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Molecular Beam ◽  
Van Der Waals ◽  
Van Der Waals Complexes ◽  
Rotational Spectra ◽  
Microwave Spectrometer ◽  
Set Up

Abstract We present the set-up of a molecular beam Fourier transform microwave spectrometer in the range from 26.6 to 40 GHz. As a test we investigated the deuterium hyperfine structure of deutero-acetonitrile, DCH2CN. It is also shown, that the spectrometer can be used to measure highly resolved rotational spectra of van der Waals complexes.

scholarly journals Rotational spectra of van der Waals complexes: pyrrole–Ne and pyrrole–Ne2

2020 ◽  
Vol 22 (44) ◽  
pp. 25652-25660 ◽  
Author(s):  
Isabel Peña ◽  
Carlos Cabezas
Keyword(s):  
Fourier Transform ◽  
Van Der Waals ◽  
Microwave Spectroscopy ◽  
Frequency Region ◽  
Van Der Waals Complexes ◽  
Chirped Pulse ◽  
Rotational Spectra ◽  
Fourier Transform Microwave Spectroscopy

Rotational spectra of van der Waals complexes pyrrole–Ne and pyrrole–Ne2 have been investigated by chirped pulse Fourier transform microwave spectroscopy in the 2–8 GHz frequency region.

Construction of a molecular beam Fourier transform microwave spectrometer used to study the 2,5-dihydrofuran-argon van der Waals complex

1997 ◽  
Vol 218 (3) ◽  
pp. 267-275 ◽  
Author(s):  
JoséL. Alonso ◽  
Felipe J. Lorenzo ◽  
Juan C. López ◽  
Alberto Lesarri ◽  
Santiago Mata ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Molecular Beam ◽  
Van Der Waals ◽  
Van Der Waals Complex ◽  
Microwave Spectrometer

33S Nuclear Hyperfine Structure in the Rotational Spectrum of Thiazole

1993 ◽  
Vol 48 (12) ◽  
pp. 1219-1222 ◽  
Author(s):  
U. Kretschmer ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Molecular Beam ◽  
Microwave Spectroscopy ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole ◽  
Centrifugal Distortion Constants

Abstract We investigated the 33S nuclear quadrupole coupling of thiazole- 33S in natural abundance by molecular beam Fourier transform microwave spectroscopy. In addition the 14N nuclear quadrupole coupling could be analyzed with high precision. We derived the rotational constants A = 8529.29268 (70) MHz, B = 5427.47098 MHz, and C = 3315.21676 (26) MHz, quartic centrifugal distortion constants and the quadrupole coupling constants of 33S χaa = 7.1708 (61) MHz and χbb= -26.1749 (69) MHz and of 14N χ aa = -2.7411 (61) MHz and χbb = 0.0767 (69) MHz.

A rotational spectroscopic and ab initio study of cis and trans (-)-carveol: Further insights into conformational dynamics in monoterpenes and monoterpenoids

2021 ◽  
Author(s):  
Arsh Singh Hazrah ◽  
Mohamad al-Jabiri ◽  
Raiden Speelman ◽  
Wolfgang Jaeger
Keyword(s):  
Fourier Transform ◽  
Ab Initio ◽  
Conformational Dynamics ◽  
Ab Initio Study ◽  
Chirped Pulse ◽  
Rotational Spectra ◽  
Microwave Spectrometer ◽  
Cis And Trans

Broadband rotational spectra of cis- and trans- (-) carveol were recorded using a chirped pulse Fourier transform microwave spectrometer in the 2-6 GHz region. To aid in spectroscopic assignments a...

The Microwave Spectrum of 2,6-Lutidine, Analysis of Internal Rotation and 14 N Hyperfine Structure

1993 ◽  
Vol 48 (11) ◽  
pp. 1093-1101 ◽  
Author(s):  
C. Thomsen ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Internal Rotation ◽  
Molecular Beam ◽  
Microwave Spectrum ◽  
Methyl Groups ◽  
Rotational Spectrum ◽  
Rotational Constants ◽  
Moments Of Inertia ◽  
Nuclear Quadrupole

Abstract The rotational spectrum of 2,6-lutidine, (CH3)2C5H3N, has been recorded between 6 and 26.5 GHz using pulsed molecular beam microwave Fourier transform spectroscopy. The rotational constants are A = 3509.7139(84) MHz, B = 1906.8639(101) MHz, and C = 1254.6215(14) MHz, the barrier to internal rotation of the two methyl groups is V3 = 1.1752 kJ/mol, their moments of inertia were found to be Iα = 3.0808(9) uÅ2 . The nitrogen nuclear quadrupole constants are χaa = +1.600(5) MHz, χbb = -4.572(3) MHz and χcc = +2.972(5) MHz.

14N-and D-Hyperfine Structure in the Rotational Spectrum of Pyrrolidine

1989 ◽  
Vol 44 (9) ◽  
pp. 837-840
Author(s):  
H. Ehrlichmann ◽  
J.-U. Grabow ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Fourier Transform Spectroscopy ◽  
Coupling Constants ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Rotational Spectra

Abstract We present an analysis of the rotational spectra of the normal and the N-deuterated pyrrolidine measured by microwave Fourier transform spectroscopy. The quartic centrifugal distortion con­ stants and the 14N coupling constants have been determined with higher accuracy. In addition the D hyperfine structure could be analyzed.

Investigation of the 14N Quadrupole Hyperfine Structure and the Stark Effect of Methyl Isocyanate and Methyl Isothiocyanate by Microwave Fourier Transform Spectroscopy

1986 ◽  
Vol 41 (4) ◽  
pp. 637-640 ◽  
Author(s):  
W. Kasten ◽  
H. Dreizler
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Hyperfine Structure ◽  
Stark Effect ◽  
Dipole Moments ◽  
Fourier Transform Spectroscopy ◽  
Methyl Isocyanate ◽  
Methyl Isothiocyanate ◽  
Rotational Spectra ◽  
Coupling Tensor

The nitrogen 14N quadrupole hyperfine structure and the Stark effect in the rotational spectra of methyl isocyanate and methyl isothiocyanate were investigated by high resolution microwave Fourier transform spectroscopy.The components of the coupling tensor in the principal inertia axis system and the n a components of the dipole moments have been determined.

scholarly journals Nuclear Quadrupole Coupling in the Rotational Spectrum of Thionyl Chloride

1992 ◽  
Vol 47 (11) ◽  
pp. 1150-1152 ◽  
Author(s):  
Ilona Merke ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Thionyl Chloride ◽  
Molecular Beam ◽  
Fourier Transform Spectrometer ◽  
Rotational Spectrum ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract We report on the analysis of the chlorine quadrupole hyperfine structure of thionyl chloride, S035Cl37 Cl, observed with a molecular beam microwave Fourier transform spectrometer

14N Quadrupole Coupling in the Rotational Spectra of Cyclopropylamine and Cyclopropyl Cyanide

1989 ◽  
Vol 44 (7) ◽  
pp. 655-658 ◽  
Author(s):  
Olaf Böttcher ◽  
Nils Heineking ◽  
Dieter Hermann Sutter
Keyword(s):  
Fourier Transform ◽  
Hyperfine Structure ◽  
Fourier Transform Spectroscopy ◽  
Coupling Constants ◽  
Rotational Spectra ◽  
Quadrupole Coupling

Abstract The 14N hyperfine structure in the rotational spectra of cyclopropylamine and cyclopropyl cyanide has been reinvestigated by microwave Fourier transform spectroscopy. The observed quadrupole coupling constants in units of MHz are: Xaa = 2.3338(18), Xbb = 1.7874(20), Xcc = −4.1209(20) for cyclopropylamine and Xaa = −3.4536(35), Xbb= 1.7468(51), Xcc= 1.7068(51) for cyclopropyl cyanide.

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