Abstract
Owing to the present accuracy of the data and various other factors, it is easy to obtain agreement with experimental results for lanthanide-induced shifts in 1H n.m.r. spectra; some considerations in the formulation of such models which have been ignored previously are discussed.
Highlights
(8) is given by equation (l),where r is the lanthanideproton distance, and X is the angle between the principal magnetic axis of the complex and a vector from the magnetic moment to the proton
If the angular factor is ignored a plot of log 6 us. log r for the various protons in a single molecule should be a straight line with a slope of -3
For adamantan-2-01, using shifts given in ref. 5, a plot of log 6 us. log [v(O-H)] gave a straight line, slope -1.6
Summary
(8) is given by equation (l),where r is the lanthanideproton distance, and X is the angle between the principal magnetic axis of the complex and a vector from the magnetic moment to the proton. If the angular factor is ignored a plot of log 6 us. Log r for the various protons in a single molecule should be a straight line with a slope of -3. A straight line was obtained, but with a slope of -2.2.
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