14N nuclear quadrupole double-resonance and the BN bond in amine-boranes and amine-trifluoroboranes

1984 ◽  
Vol 58 (2) ◽  
pp. 235-242
Author(s):  
Albert Lotz ◽  
Jürgen Voitländer
1982 ◽  
Vol 93 (6) ◽  
pp. 560-563 ◽  
Author(s):  
A. Lötz ◽  
J. Olliges ◽  
J. Voitländer

1990 ◽  
Vol 45 (3-4) ◽  
pp. 559-564 ◽  
Author(s):  
V. S. Grechishkin

Abstract New NQR methods, developed over the past years, are discussed: 1. Two frequency NQR double resonance, 2. the influence of strong off-resonance combination of rf pulses on demagnetized state in NQR, 3. remote NQR.


1988 ◽  
Vol 43 (7) ◽  
pp. 657-661 ◽  
Author(s):  
N. Heineking ◽  
H. Dreizler

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.


1981 ◽  
Vol 85 (19) ◽  
pp. 2738-2740 ◽  
Author(s):  
Leslie G. Butler ◽  
C. P. Cheng ◽  
Theodore L. Brown

1977 ◽  
Vol 29 (4) ◽  
pp. 233-290 ◽  
Author(s):  
D.T. Edmonds

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