The use of π-complex formation to modify anisotropic effects in nuclear magnetic resonance spectra in the 9,10-dihydroanthracene series

1967 ◽  
Vol 0 (7) ◽  
pp. 309a-309a
Author(s):  
C. R. M. Butt ◽  
D. Cohen ◽  
L. Hewitt ◽  
Ian T. Millar
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Complex Formation ◽  
Nuclear Magnetic Resonance Spectra ◽  
Π Complex ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Peak doubling in the nuclear magnetic resonance spectra of certain phosphorus esters

1969 ◽  
Vol 47 (1) ◽  
pp. 35-41 ◽  
Author(s):  
R. V. Jardine ◽  
A. H. Gray ◽  
J. B. Reesor
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Complex Formation ◽  
Uranyl Nitrate ◽  
Relative Population ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonances ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic ◽  
Steric Control

Doubling of nuclear magnetic resonances of certain mixed phosphorus esters has been observed and has been attributed to the presence of rotational conformers occupying "up" and "down" orientations of the ester moieties. Treatment of these esters with uranyl nitrate results in the expected resonances, although chemically shifted.This is believed to be due to the "freezing" of rotational conformers by complex formation. Dependence of the observed resonances upon temperature supports this hypothesis. There appears to be some steric control over the relative population of the contributing conformers.

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