Isotropic hyperfine interaction with the fluorine nuclei in fluorinated aromatic radicals

1970 ◽  
Vol 10 (6) ◽  
pp. 885-891 ◽  
Author(s):  
P. V. Schastnev ◽  
G. M. Zhidomirov ◽  
N. D. Chuvylkin
Keyword(s):  
Hyperfine Interaction ◽  
Aromatic Radicals ◽  
Isotropic Hyperfine Interaction

The solvent effect on the isotropic hyperfine interaction in some aliphatic polyamine copper(II) complexes

1984 ◽  
Vol 22 (10) ◽  
pp. 629-635 ◽  
Author(s):  
V. G. K. M. Pisipati ◽  
N. V. S. Rao ◽  
V. Muralikrishna ◽  
V. S. Murthy ◽  
T. Kesavan
Keyword(s):  
Hyperfine Interaction ◽  
Solvent Effect ◽  
Isotropic Hyperfine Interaction

A theoretical study of the 14N and 17O N.M.R. shifts in lanthanide complexes

1972 ◽  
Vol 25 (12) ◽  
pp. 2577 ◽  
Author(s):  
RM Golding ◽  
MP Halton
Keyword(s):  
Hyperfine Interaction ◽  
Lanthanide Complexes ◽  
Theoretical Study ◽  
Second Order ◽  
Orbit Coupling ◽  
Order Perturbation ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Lanthanide Ion ◽  
Isotropic Hyperfine Interaction

The experimental 14N and 17O n.m.r, results in a series of lanthanide complexes are successfully interpreted from a second-order perturbation treatment of the calculation of (S2), where bonding effects and spin-orbit coupling mixing are incorporated. The isotropic hyperfine interaction constants are shown to be negative for 14N and positive for 17O but both independent of the particular lanthanide ion. We also confirm that the 4f orbitals are not involved in direct bonding with the ligands.

The isotropic hyperfine interaction in some aliphatic polyamine copper II complexes

1981 ◽  
Vol 17 (4) ◽  
pp. 235-238 ◽  
Author(s):  
V. G. K. M. Pisipati ◽  
G. Satyanandam ◽  
N. V. S. Rao
Keyword(s):  
Hyperfine Interaction ◽  
Isotropic Hyperfine Interaction

Fluorine Hyperfine Interaction in Aromatic Anion Radicals

1969 ◽  
Vol 24 (12) ◽  
pp. 1980-1988 ◽  
Author(s):  
J.P. Colpa ◽  
P. H. H. Fischer
Keyword(s):  
Hyperfine Interaction ◽  
Theoretical Estimate ◽  
Aromatic Radicals ◽  
Hyperfine Splittings ◽  
Two Parameters ◽  
Q Factors ◽  
Spin Densities ◽  
Anion Radicals

The relation between the fluorine hyperfine splittings in about 20 fluorine substituted aromatic radicals and the π spin densities calculated according to McLachlans method is analysed with an expression of the type aF = QFFF ρπFF + QFCC ρπCC + (QFFC + QFFC) ρπFC . For the Q factors the following values are obtained: QFFF =931 gauss; QFCC =86.6 gauss and (QFFC + QFFC) =345 gauss. Two simpler expressions with one and two parameters respectively are also tested. A theoretical estimate is made for the values of the Q factors and the results are compared with the values obtained semi-empirically.

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