Nitrogen Quadrupole Coupling in Ethyl Isocyanide, C2H5NC

In this paper we present a 14N-quadrupole hyperfine structure analysis for ethyl isocyanide, CH3CH2NC, by use of microwave Fourier transform spectroscopy. For earlier works as e.g. CH3NC [1], such narrow splittings as they are met with in the case of the isonitriles had to be measured employing a maser beam spectrometer.

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

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-0709 ◽

1989 ◽

Vol 44 (7) ◽

pp. 655-658 ◽

Cited By ~ 6

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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Nitrogen and Deuterium Hyperfine Structure in the Rotational Spectrum of Morpholine

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-0910 ◽

1989 ◽

Vol 44 (9) ◽

pp. 833-836 ◽

Cited By ~ 8

Author(s):

J.-U. Grabow ◽

H. Ehrlichmann ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Fourier Transform Spectroscopy ◽

Coupling Constants ◽

Rotational Spectrum ◽

Rotational Spectra ◽

Quadrupole Coupling

Abstract We reinvestigated the rotational spectra of morpholine and N-deutero morpholine with the higher precision of microwave Fourier transform spectroscopy. The rotational, centrifugal, and nitrogen quadrupole coupling constants were improved and the deuterium quadrupole coupling constants determined.

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Nitrogen and Deuterium Hyperfine Structure in the Rotational Spectrum of Piperidine

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-0912 ◽

1989 ◽

Vol 44 (9) ◽

pp. 841-847 ◽

Cited By ~ 1

Author(s):

H. Ehrlichmann ◽

J.-U. Grabow ◽

H. Dreizler ◽

N. Heineking ◽

M. Andolfatto

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Fourier Transform Spectroscopy ◽

Coupling Constants ◽

Rotational Spectrum ◽

Rotational Spectra ◽

Coupling Tensor ◽

Quadrupole Coupling

Abstract We reinvestigated by microwave Fourier transform spectroscopy the rotational spectra of the axial and equatorial isotopomers of piperidine and N-deutero piperidine. The rotational, centrifugal, and nitrogen quadrupole coupling constants were improved, the deuterium quadrupole coupling constants were determined. The principal coupling tensor elements for nitrogen were estimated.

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Boron Hyperfine Structure in Trifluorophosphine-Borane

Zeitschrift für Naturforschung A ◽

10.1515/zna-1985-0910 ◽

1985 ◽

Vol 40 (9) ◽

pp. 920-922

Author(s):

W. Kasten ◽

H. Dreizler ◽

R. L. Kuczkowski

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Bond Order ◽

Fourier Transform Spectroscopy ◽

Microwave Spectrum ◽

Centrifugal Distortion ◽

Quadrupole Coupling ◽

Centrifugal Distortion Constants

Abstract We reinvestigated the microwave spectrum of trifluorophosphine-borane by microwave Fourier transform spectroscopy and determined the quadrupole coupling and centrifugal distortion constants for both isotopes 10B and 11B. The B-P bond order is discussed.

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Notizen: A Highly Resolved Rotational Transition of Urea Measured for Radioastronomical Searches. Analysis of the Nitrogen Quadrupole Coupling

Zeitschrift für Naturforschung A ◽

10.1515/zna-1986-0913 ◽

1986 ◽

Vol 41 (9) ◽

pp. 1173-1174 ◽

Cited By ~ 11

Author(s):

W. Kasten ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

Laboratory Experiment ◽

Hyperfine Structure ◽

Rotational Transition ◽

Fourier Transform Spectroscopy ◽

Quadrupole Coupling

We reinvestigated the 14N quadrupole hyperfine structure (hfs) of the JK-K+ = 110 - 101, transition of urea by use of microwave Fourier transform spectroscopy.We resolved eight components of the hfs pattern to provide a precise laboratory experiment for possible radioastronomical searches.

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33S Nuclear Hyperfine Structure in the Rotational Spectrum of Thiazole

Zeitschrift für Naturforschung A ◽

10.1515/zna-1993-1211 ◽

1993 ◽

Vol 48 (12) ◽

pp. 1219-1222 ◽

Cited By ~ 18

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.

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14N Quadrupole Coupling in the Rotational Spectrum of Nitrosobenzene

Zeitschrift für Naturforschung A ◽

10.1515/zna-1988-0414 ◽

1988 ◽

Vol 43 (4) ◽

pp. 385-387

Author(s):

Ch. Keussen ◽

U. Andresen ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

Hyperfine Structure ◽

Rotational Spectrum ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

Abstract As the technique of microwave Fourier transform (MWFT) spectroscopy was improved in the recent years we give a reinvestigation of the 14N nuclear quadrupole hyperfine structure of nitroso benzene.

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

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-0911 ◽

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.

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Deuterium Quadrupole Coupling Constants of Deuterohalogenoacetylens

Zeitschrift für Naturforschung A ◽

10.1515/zna-1988-8-907 ◽

1988 ◽

Vol 43 (8-9) ◽

pp. 755-757 ◽

Cited By ~ 14

Author(s):

N. Heineking ◽

M. Andolfatto ◽

C. Kruse ◽

W. Eberstein ◽

H. Dreizler

Keyword(s):

Fourier Transform ◽

High Resolution ◽

Fourier Transform Spectroscopy ◽

Spin Rotation ◽

Coupling Constants ◽

Centrifugal Distortion ◽

Quadrupole Coupling ◽

Nuclear Quadrupole ◽

Rotational Transitions

Abstract Employing the high resolution of microwave Fourier transform spectroscopy, we investigated the lowest rotational transitions of fluoro-, bromo-, and iodoacetylene-d. Along with the rotational, centrifugal distortion, halogen nuclear quadrupole, and halogen spin-rotation coupling constants, we determined the deuterium quadrupole coupling constants of bromo-and iodoacetylene-d. For fluoroacetylene-d, we redetermined the deuterium nuclear quadrupole coupling constants with higher accuracy.

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