ISSN:
0749-1581
Keywords:
13C NMR
;
Carbon - carbon coupling constants
;
Heteroaromatic five-membered rings
;
Diazoles
;
Triazoles
;
Oxazoles
;
Oxadiazoles
;
Thiazoles
;
Thiadiazoles
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A set of 14 1J(CC) spin - spin coupling constants are reported for 11 five-membered heteroaromatic molecules, including all relevant diazole, triazole, oxazole, oxadiazole, thiazole and thiadiazole systems. The couplings show a clear distinction between carbon - carbon bonds which are formally double or single, respectively. There seems to be no correlation of the couplings with the bond lengths concerned, in spite of some apparent trends. Potential applications of the couplings are discussed in assessing the aromaticity of five-membered heterocycles.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260320113
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