Long-Distance Effect on One-Bond CC Scalar couplings upon introduction of a double bond in bicyclic systems

✍ Scribed by Graeme R. Jones; Stefano Caldarelli; Pierre Vogel

• Book ID: 102256319
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: German
• Weight: 411 KB
• Volume: 80
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19970800105

✦ Synopsis

Abstract

Anomalous variations of one‐bond CC scalar coupling constants are observed in going from trinorbornane‐to trinorbornene‐like structures. Most notably, a 10‐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.