Chemical‐Shift Anisotropy and Nuclear Quadrupole Coupling Constant of14N in Methyl Isocyanide

1970 ◽  
Vol 52 (4) ◽  
pp. 2005-2010 ◽  
Author(s):  
Costantino S. Yannoni
Keyword(s):  
Chemical Shift ◽  
Chemical Shift Anisotropy ◽  
Quadrupole Coupling Constant ◽  
Coupling Constant ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Methyl Isocyanide ◽  
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.

The 59Co nuclear magnetic resonance spectra of polycrystalline complexes

1987 ◽  
Vol 65 (6) ◽  
pp. 1332-1335 ◽  
Author(s):  
Donald R. Eaton ◽  
Richard J. Buist ◽  
Brian G. Sayer
Keyword(s):  
Chemical Shift ◽  
Chemical Shift Anisotropy ◽  
Quadrupole Coupling Constant ◽  
Coupling Constant ◽  
X Ray ◽  
Low Field ◽  
Nmr Data ◽  
Nuclear Magnetic Resonance Spectra ◽  
Quadrupole Coupling ◽  
Low Field Nmr

The solid state 59Co nmr spectra of a number of octahedral complexes are reported. In the case of sodium hexanitrocobaltate(III) the spectra have been obtained at several different field strengths and the results are analysed to give a quadrupole coupling constant of 9.4 MHz, an asymmetry parameter of zero and an axial chemical shift tensor with an anisotropy of 180 ppm. Several other complexes have been examined at high field (11.8 T) to minimize the effects of quadrupole coupling and maximize the influence of chemical shift anisotropy. The results are, where possible, compared with single crystal X-ray and low field nmr data. It is concluded that high fields are necessary to obtain reliable chemical shift anisotropy values. The conditions necessary for obtaining reasonable quality spectra from polycrystalline samples containing quadrupolar nuclei are discussed.

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