𝔖 Bobbio Scriptorium
✦   LIBER   ✦

NMR spin—spin decoupling studies of some 5,6-disubstituted bicyclo[2.2.2]oct-2-enes. Assignment of vinylic protons and demonstration of allylic coupling

✍ Scribed by David B. Roll; Bernard J. Nist; Alain C. Huitric

Publisher
John Wiley and Sons
Year
1967
Tongue
English
Weight
386 KB
Volume
56
Category
Article
ISSN
0022-3549

No coin nor oath required. For personal study only.

✦ Synopsis

Assignment of the NMR signals of the vinylic protons has been accomplished by spin-spin decoupling in endo-S-nitro-exo-6-(p-chlorophenyl)-bicyclo[2.2.~]oct-~ene (I), endo-5-amino-exo-6-(p-chlorophenyI)-bicyclo[2.2.2]oct-2-ene hydrobromide (IV), endo-5-cyano-exo-6-(pp-chlorophenyl)-bicyclo[2.2.2]oct-2-ene (V), endo-5-cyano-endo-6-(p-chlorophenyl)-bicyclo[2.2.2]oct-2-ene (VII), all of which show significant differences in the chemical shifts of the two vinylic protons. A long-range coupling of 1.5 C.P.S. is demonstrated between H-1 and H-3 and between H-4 and H-2 in these systems.

📜 SIMILAR VOLUMES

A variable-temperature 13C cross-polariz
A variable-temperature 13C cross-polarization magic angle spinning NMR study of some unusual dynamic and phase properties of (±)-3,4-di-O-acetyl-1,2,5,6-tetra-O-benzyl-myo-inositol, ‘jumping crystals’
✍ Jamila Fattah; J. Mark Twyman; Christopher M. Dobson 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 598 KB

## Abstract Variable‐temperature ^13^C CP/MAS NMR experiments were carried out on crystalline (±)‐3,4‐di‐__O__‐acetyl‐1,2,5,6‐tetra‐__O__‐benzyl‐__myo__‐inositol. Three distinct phases can be distinguished from their NMR characteristics, each stable over a well defined temperature range, in accord