Microwave Spectrum of Acetyl Cyanide in the Ground and Excited States. I

Abstract The microwave spectra of acetyl cyanide, CH3COCN, in the ground and in the two lowest excited states have been investigated. The rotational constants and the quadrupole coupling constants have been evaluated for all these states. The internal rotation parameters have been refined with respect to previous works. Evidence for a rotation-torsion -vibration interaction has been found in the spectra of the excited states.

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Mikrowellenspektrum und rotationsspektroskopische Konstanten der Methylchlorsilane: CH3SiH2Cl, CH3SiD2Cl und CD3SiD2Cl / Microwave Spectrum and Rotational Spectroscopic Constants of Methyl-chloro-silane: CH3SiH2Cl, CH3SiD2Cl and CD3SiD2Cl

Zeitschrift für Naturforschung A ◽

10.1515/zna-1975-1112 ◽

1975 ◽

Vol 30 (11) ◽

pp. 1441-1446

Author(s):

W. Zeil ◽

W. Braun ◽

B. Haas ◽

H. Knehr ◽

F. Rückert ◽

...

Keyword(s):

Microwave Spectrum ◽

Coupling Constants ◽

Spectroscopic Constants ◽

Centrifugal Distortion ◽

Rotational Constants ◽

Microwave Spectra ◽

Isotopic Species ◽

Quadrupole Coupling ◽

Nuclear Quadrupole ◽

Centrifugal Distortion Constants

The microwave spectra of the following isotopic species of Methyl-chloro-silane: CH3SiH2Cl, CH3SiD2 and CD3SiD2Cl have been measured and the rotational spectroscopic constants (rotational constants, centrifugal distortion constants and nuclear quadrupole coupling constants) have been determined

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Microwave Spectrum of Butyronitrile: Methyl Internal Rotation and 14N Quadrupole Coupling

Zeitschrift für Naturforschung A ◽

10.1515/zna-1988-0409 ◽

1988 ◽

Vol 43 (4) ◽

pp. 338-344 ◽

Cited By ~ 16

Author(s):

Kirsten Vormann ◽

Helmut Dreizler

Keyword(s):

Internal Rotation ◽

Ground State ◽

Microwave Spectrum ◽

Coupling Constants ◽

Quadrupole Coupling ◽

Rotation Parameters

Abstract We determined the internal rotation parameters of butyronitrile, antiperiplanar and synclinal, in the internal rotation ground state. The 14N quadrupole coupling constants were refined.

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Zum Mikrowellenspektrum des Isobutyronitrils

Zeitschrift für Naturforschung A ◽

10.1515/zna-1967-0415 ◽

1967 ◽

Vol 22 (4) ◽

pp. 543-545 ◽

Cited By ~ 9

Author(s):

G. E. Herberich

Keyword(s):

Lower Bound ◽

Internal Rotation ◽

Barrier Height ◽

Microwave Spectrum ◽

Coupling Constants ◽

Methyl Groups ◽

Kcal Mole ◽

Rotational Constants ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

The microwave spectrum of isobutyronitrile has been investigated in the region from 5 — 30 GHz. A and C type transitions have been observed. No splittings due to internal rotation of the methyl groups could be detected and a lower bound of 2.6 kcal/mole for the barrier height is established.Values for the rotational constants are 7.940 95 ± 0.000 04, 3.968 039 ± 0.000 010 and 2.901 030 ± 0.000 010 GHz.The nuclear quadrupole coupling constants are χαα=—3.905±0.010 MHz, χbb=2.077±0.02 MHz and χcc=1.828±0.017 MHz.

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Mikrowellenspektrum, Rotationskonstanten, Zentrifugalverzerrungskonstanten und Kernquadrupolkopplungskonstanten des CD3SiH2Cl. Über Bindungseigenschaften in Silicium-Halogeniden: 1. Mitteilung / Microwave spectrum, rotational constants, centrifugaldistortion constants and nuclear quadrupole coupling constants of CD3SiH2Cl

Zeitschrift für Naturforschung A ◽

10.1515/zna-1972-0715 ◽

1972 ◽

Vol 27 (7) ◽

pp. 1150-1159 ◽

Cited By ~ 1

Author(s):

Werner Zeil ◽

Richard Gegenheimer ◽

Saskia Pferrer ◽

Marwan Dakkouri

Keyword(s):

Microwave Spectrum ◽

Coupling Constants ◽

Rotational Constants ◽

Microwave Spectra ◽

Isotopic Species ◽

Quadrupole Coupling ◽

Nuclear Quadrupole

Abstract Microwave The microwave spectra of the following isotopic species of methylchloro-silane CD328SiH235Cl, CD329SiH235Cl, CD330SiH235Cl, CD328SiH237Cl have been measured and analyzed. The rotational constants, centrifugaldistortion constants and nuclear quadrupole coupling constants have been determined. The Si-Cl-distance is 2.049 Å respectively 2.052 Å as calculated by the rs method. The corresponding angles between the siliconchlorine-bond and the inertia-axis a are Θ = 26°53' respectively 26°49'

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