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Use of lanthanide shift reagents to probe the conformation of fatty acids in solution by 13 C NMR
Author(s) -
Pons Miquel,
Chapman Dennis
Publication year - 1986
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260240710
Subject(s) - chemistry , lanthanide , ytterbium , reagent , polymer , nmr spectra database , carbon 13 nmr , spectral line , stereochemistry , organic chemistry , ion , physics , optoelectronics , doping , astronomy
Abstract The conformational analysis of short polymer chains involves the use of statistical models, and their predictions must be checked against experimental information. Ytterbium‐induced shifts in the 13 C NMR spectra of fatty acids provide a non‐perturbing, straightforward method of simultaneously obtaining positional information about all the carbon atoms up to nine bonds away from the comuplexation point. Experimental results for saturated and unsaturated C‐18 fatty acids are compared with the predictions of a restricted isomeric states (RIS) model.