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Resume-La RMN a 250 et a 300 MHz combinee a des experiences de double irradiation de type classique ou INDOR a ete utilisee pour Ctablir sans ambiguite la structure endo d'un trim6thylsilyl-3 norbornbne-5. Les deplacements chimiques et les constantes de couplage ont ete tres exactement dCterminCs, des couplages a longue distance n'obeissant pas a la 'regle du W' ont etB mis en evidence.Abstract-High field NMR spectroscopy, double resonance and INDQR experiments are used for unambiguous assignment of the endo configuration of 3-trimethylsilyl-5-norbornene. Chemical shifts and coupling constants have been accurately determined and tested by computer simulation. Some 'non W' long range couplings are demonstrated.

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