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.


Published in:
Helvetica Chimica Acta, 80, 1, 59-64
Year:
1997
ISSN:
0018-019X
Keywords:
Note:
Univ lausanne,bch,chim sect,ch-1015 lausanne,switzerland.
Laboratories:




 Record created 2005-11-09, last modified 2018-03-17


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