Method of sepctral analysis using NMR shift reagents

Details Method of sepctral analysis using NMR shift reagents Method of sepctral analysis using NMR shift reagents

1974-07-24

1976-04-13

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

23230M, 2604292, C01F 1700, G01N 2778

Patent

active

039501353

ABSTRACT:
The ability of nuclear magnetic resonance spectroscopy to distinguish between compounds and between parts of compounds is substantially increased by the use of certain rare earth chelate shift reagents. The preferred shift reagents are the europium III chelates of substituted or unsubstituted dicampholyl ligands, and europium III chelates of substituted or unsubstituted nopinato compounds. The reagents are particularly useful in determining the enantiomeric purity of compositions containing mixtures of enantiomers.

REFERENCES:
patent: 3700410 (1972-10-01), Sievers
patent: 3789060 (1974-01-01), Goering
patent: 3846333 (1974-11-01), Sievers
patent: 3867418 (1975-02-01), Burgett
M. D. McCreary et al., J.A.C.S., 96, 1038-1054, (Feb. 20, 1974).

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