The determination of the 14N nuclear quadrupole coupling constant for the methylammonium ion in a liquid-crystal solution

1982 ◽  
Vol 47 (1) ◽  
pp. 148-150 ◽  
Author(s):  
Paul Polatin ◽  
Thomas Barbara ◽  
B.P Dailey
Keyword(s):  
Liquid Crystal ◽  
Quadrupole Coupling Constant ◽  
Coupling Constant ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Weak Complexes of Dinitrogen: An Approach to the 14N-Nuclear Quadrupole Coupling Constant of Free N2

1992 ◽  
Vol 47 (1-2) ◽  
pp. 367-370 ◽  
Author(s):  
A. C. Legon ◽  
P. W. Fowler
Keyword(s):  
Ground States ◽  
Zero Point ◽  
Quadrupole Coupling Constant ◽  
Coupling Constants ◽  
Coupling Constant ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Weak Complexes ◽  
Nuclear Quadrupole

AbstractThe 14N-nuclear quadrupole coupling constants χaa(14N<2>) and χaa(14N(1)) for the ground-states of the dimers 14N(2)14N(1) • • • HCCH and 14N(2)14N(1) • • • HC15N have been corrected for zero-point effects and for the electrical effects of the subunit HX to give two estimatesχ(14N) = -5.01 (13) and - 5.07 (8) MHz, respectively, for the coupling constant of the isolated 14N2 molecule

Rotationskonstante und Kernquadrupolkopplungskonstante des Trimethylehlorsilans, bestimmt aus Mikrowellenspektren / Rotational Constant and Nuclear Quadrupole Coupling Constant of Trimethylchlorosilane, Determined by Microwave Spectrum

1973 ◽  
Vol 28 (7) ◽  
pp. 1230-1232
Author(s):  
Werner Zeil ◽  
Bernhard Haas
Keyword(s):  
Quadrupole Splitting ◽  
Quadrupole Coupling Constant ◽  
Rotational Constant ◽  
Microwave Spectrum ◽  
Coupling Constant ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

The microwave spectrum of trimethylchlorosilane has been investigated between 8 and 20 GHz. The quadrupole splitting of the K = 0 lines of the transitions J = 2 → 3 and 3 → 4 have been determined. The quadrupole coupling constant of the Cl-35 atom is determined to -34.701 MHz, and the rotational constant is determined to B0 = 2197.382 MHz.

Formation of Cyanopolyynes in Gas Discharges

1978 ◽  
Vol 33 (10) ◽  
pp. 1169-1172 ◽  
Author(s):  
G. Winnewisser ◽  
R. A. Creswell ◽  
M. Winnewisser ◽  
M. Winnewisser
Keyword(s):  
Quadrupole Coupling Constant ◽  
Carbon Chain ◽  
Coupling Constant ◽  
Chain Molecules ◽  
Gas Discharges ◽  
Molecule Formation ◽  
Radiofrequency Discharge ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract Cyanodiacetylene, H(C ≡ C)2 CN has been produced by a radiofrequency discharge in a mixture of acetylene, HCCH, and hydrogen cyanide, HCN. This reaction is of astrophysical importance, since it lends support to the possibility of the ion-molecule formation scheme of producing long carbon chain molecules in interstellar sources. From a measurement of the J = 4←3 transition of HC5N the nuclear quadrupole coupling constant eqQ = - 4.242 (30) MHz was determined.

Temperature and Pressure Dependence of 209Bi Nuclear Quadrupole Resonance in BiCl3

1972 ◽  
Vol 50 (16) ◽  
pp. 2586-2590 ◽  
Author(s):  
G. C. Gillies ◽  
R. J. C. Brown
Keyword(s):  
Pressure Dependence ◽  
Room Temperature ◽  
Quadrupole Coupling Constant ◽  
Coupling Constant ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Quadrupole Resonance ◽  
Temperature And Pressure ◽  
Nuclear Quadrupole ◽  
Crystal Volume

The temperature and pressure dependence of the 209Bi nuclear quadrupole coupling constant and asymmetry parameter in solid BiCl3 have been measured near room temperature. It is not possible to account for the results on the basis of the conventional theory in which the field gradient parameters depend only on the crystal volume.

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