SPIN-SPIN COUPLINGS BETWEEN C-13 NUCLEI IN 5-MEMBERED HETEROAROMATIC RING-SYSTEMS

Authors
WITANOWSKI M BIEDRZYCKA Z
Citation
M. Witanowski et Z. Biedrzycka, SPIN-SPIN COUPLINGS BETWEEN C-13 NUCLEI IN 5-MEMBERED HETEROAROMATIC RING-SYSTEMS, Magnetic resonance in chemistry, 32(1), 1994, pp. 62-66
Citations number
26
Categorie Soggetti
Spectroscopy,Chemistry
Journal title
Magnetic resonance in chemistry → ACNP
ISSN journal
07491581
Volume
32
Issue
1
Year of publication
1994
Pages
62 - 66
Database
ISI
SICI code
0749-1581(1994)32:1<62:SCBCNI>2.0.ZU;2-4
Abstract
A set of 14 (1)J(CC) spin-spin coupling constants rue 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 corr elation of the couplings with the bond lengths concerned, in spite of some apparent trends. Potential applications of the couplings are disc ussed in assessing the aromaticity of five-membered heterocycles.