Rotational spectrum, H,19F spin–spin and D–nuclear quadrupole coupling constants, and molecular geometry of the sulphur dioxide–hydrogen fluoride dimer

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.

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The 33S Nuclear Quadrupole Coupling in the Rotational Spectrum of 2,2–Dimethylthiirane

Zeitschrift für Naturforschung A ◽

10.1515/zna-1996-10-1110 ◽

1996 ◽

Vol 51 (10-11) ◽

pp. 1110-1112 ◽

Cited By ~ 2

Author(s):

Jens-Uwe Grabow ◽

Masao Onda ◽

Helmut Dreizler

Keyword(s):

Hyperfine Structure ◽

Coupling Constants ◽

Rotational Spectrum ◽

Rotational Constants ◽

Its Analysis ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

Abstract The rotational spectrum of 33S 2,2-dimethylthiirane with its 33S nuclear quadrupole coupling hyperfine structure in the range 8.9 to 20.0 GHz and its analysis is reported. The rotational constants are A = 5507.4663(3), B = 3440.58395(18), and C = 2978.5723(3) MHz. The 33 S quadrupole coupling constants are χaa = -22.6390(23), χbb = 47.1830(50), and χcc = -24.5440(50) MHz.

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Nuclear Quadrupole Hyperfine Structure in the Rotational Spectrum of 3-Chloropyridine. An Application of Microwave-Microwave Double Resonance Fourier Transform Spectroscopy

Zeitschrift für Naturforschung A ◽

10.1515/zna-1988-0708 ◽

1988 ◽

Vol 43 (7) ◽

pp. 657-661 ◽

Cited By ~ 9

Author(s):

N. Heineking ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Double Resonance ◽

Fourier Transform Spectroscopy ◽

Coupling Constants ◽

Rotational Spectrum ◽

Rotational Constants ◽

Modulation Technique ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

AbstractWe redetermined the rotational and the chlorine-35 and nitrogen-14 nuclear quadrupole coupling constants of 3-chloropyridine. The values are A = 5839.5330(12) MHz, B = 1604.1875(6) MHz, and C = 1258.3121 (5) MHz for the rotational constants, and χaa(Cl) = - 72.255(19) MHz, χbb(Cl) = + 38.500(13) MHz, χcc(Cl) = + 33.755(23) MHz and χaa(N) = - 0.009(13) MHz, χbb(N) = - 3.473(10) MHz, χCC(N) = + 3.482(16) MHz for the chlorine-35 and nitrogen-14 nuclear quadrupole coupling constants, respectively.Application of double resonance modulation technique is shown to greatly simplify the assignment of hyperfine structure components even of weak rotational transitions.

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Rotational Spectrum of Aminoborane: Centrifugal Distortion Constants and Boron and Nitrogen Hyperfine Structure

Zeitschrift für Naturforschung A ◽

10.1515/zna-1991-0905 ◽

1991 ◽

Vol 46 (9) ◽

pp. 770-776 ◽

Cited By ~ 1

Author(s):

Kirsten Vormann ◽

Helmut Dreizler ◽

Jens Doose ◽

Antonio Guarnieri

Keyword(s):

Hyperfine Structure ◽

Spin Rotation ◽

Coupling Constants ◽

Rotational Spectrum ◽

Centrifugal Distortion ◽

Rotational Spectra ◽

Quadrupole Coupling ◽

Wave Region ◽

Nuclear Quadrupole ◽

Centrifugal Distortion Constants

AbstractThe boron and nitrogen hyperfine structure in the rotational spectra of two aminoborane isotopomers, 11 BH2NH2 and 10BH2NH2, has been investigated and the quadrupole coupling constants of boron 10B, 11B and nitrogen 14N have been determined. We get the following results for the nuclear quadrupole coupling constants: χaa(11B) = -1.684 (14) MHz, χbb(11B) = -2.212 (11) MHz, χcc(11B) = 3.896(11) MHz, χaa(10B) = -3.481 (11) MHz, χbb(10B) = -4.623 (14) MHz, χCC(10B) = 8.104 (14) MHz and xaa(14N) = 0.095 (9) MHz, χbb(14N) = 2.091 (8) MHz, χcf4 (14N)=-2.186 (8) MHz. These nitrogen quadrupole coupling constants are those of the 11BH2 NH2 isotopomer. Additionally we were able to determine two out of the three spin rotation coupling constants caa, cbb, and ccc of boron, caa(11 B = 55.2 (26) kHz, cbb(11B) = 6.62 (36) kHz, caa (10B) = 15.26 (69) kHz and cbb(10B) = 4.94 (70) kHz. The spin rotation coupling constants ccc had to be fixed to zero in both cases. Furthermore we measured the rotational spectra in the mm-wave region to determine all quartic and several sextic centrifugal distortion constants according to Watson's A and S reduction

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