ISSN:
0749-1581
Keywords:
1H/13C NMR
;
Crown ethers
;
Complexation with alkali metal cations
;
Intramolecular flexibility
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The1H and 13C NMR spectra of a series of structurally related crown ethers were recorded, and alkali metal complexation of the crown ethers was studied for different Li, Na and K salts. The alkali metal salt-induced 1H and 13C chemical shifts are discussed in terms of conformational changes within the macrocyclic ring, and the results obtained were proved to be general by means of NOE enhancement factors and spin-lattice relaxation time measurements.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260270714