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NMR studies of bridged ring systems: XIX—13C1H spin coupling and 13C chemical shift of the bridge methylene in benzonorbornene and benzonorbornadiene

✍ Scribed by Kazuo Tori; Tadahiko Tsushima; Hiroshi Tanida; Katsuhiko Kushida; Shiroh Satoh

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
252 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Data on ^13^C chemical shifts and ^13^C^1^H spin coupling constants of norbornane (1), norbornene (2), norbornadiene (3), benzonorbornene (4) and benzonorbornadiene (6) are reported. The non‐equivalence in J(^13^CH) values determined from the two bridge methylene proton signals in 2,2,3,3‐tetradeuteriobenzonorbornene (5) and 6 is briefly discussed. The extraordinary deshielding of the bridge methylene carbon in 6 has been noted.

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