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research article
Long-distance effect on one-bond C-C scalar couplings upon introduction of a double bond in bicyclic systems
Anomalous variations of one-bond C-C scalar coupling constants are observed in going from trinorbornane-to trinorbornene-like structures. Most notably, a IO-Hz increase is observed in the coupling constant involving the C-atoms of the ethano branch facing the C=C bond. An effect of about half the size is characteristic of higher homologues (bicyclo[2.2.2]octenes), but no such effect is observed for monocyclic molecules.
Type
research article
Authors
Publication date
1997
Published in
Volume
80
Issue
1
Start page
59
End page
64
Note
Univ lausanne,bch,chim sect,ch-1015 lausanne,switzerland.
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 9, 2005
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