LONG-DISTANCE EFFECT ON ONE-BOND C-C SCALAR COUPLINGS UPON INTRODUCTION OF A DOUBLE-BOND IN BICYCLIC SYSTEMS

Authors
JONES GR CALDARELLI S VOGEL P
Citation
Gr. Jones et al., LONG-DISTANCE EFFECT ON ONE-BOND C-C SCALAR COUPLINGS UPON INTRODUCTION OF A DOUBLE-BOND IN BICYCLIC SYSTEMS, Helvetica Chimica Acta, 80(1), 1997, pp. 59-64
Citations number
37
Categorie Soggetti
Chemistry
Journal title
Helvetica Chimica Acta → ACNP
ISSN journal
0018019X
Volume
80
Issue
1
Year of publication
1997
Pages
59 - 64
Database
ISI
SICI code
0018-019X(1997)80:1<59:LEOOCS>2.0.ZU;2-C
Abstract
Anomalous variations of one-bond C-C scalar coupling constants are obs erved in going from trinorbornane-to trinorbornene-like structures. Mo st notably, a IO-Hz increase is observed in the coupling constant invo lving 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 molecul es.