The FTIR spectrum of the S-cis conformer of 1,3-butadiene, slightly perturbed on silica surface

Hyperconjugative Interactions in Bicyclo

Hyperconjugative Interactions in Bicyclo[2.2.1]heptane Derivatives. Effects on the Diels-Alder Reactivity of the s-cis-Butadiene Group of 2, 3-Dimethylidene-norbornanes

✍ Michèle Hardy; Pierre-Alain Carrupt; Pierre Vogel 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 German ⚖ 859 KB

## Abstract Chemical and spectroscopic properties of the s‐__cis__‐butadiene chromophore in 2, 3‐dimethylidene‐norbornane can be modified without direct substitution of the diene moiety. Introduction of an etheral bridge for the H~2~C(7) bridge (**2**, **4**, **6**) and/or introduction of a double