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The CC double bond of a bidentate carbene-alkene complex of tungsten as an internal NMR probe for the coordination of Lewis acids

✍ Scribed by A. Parlier; H. Rudler; M. Fontanille; A. Soum

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
187 KB
Volume
312
Category
Article
ISSN
0022-328X

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13C NMR of diterpenes: Use of the C-19 m
13C NMR of diterpenes: Use of the C-19 methyl group as a probe for locating a tetrasubstituted double bond
✍ Martine Taran; Bernadette Arreguy-San Miguel; Bernard Delmond; Michel Petraud; B 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 164 KB

The 13C NMR spectra of diterpenic derivatives having pimarane, isopirnarane and the (13s) rosane skeleton have been recorded. This analysis has shown that the chemical shift of the 19-CH3 group depends on the position of the tetrasubstituted double bond in these skeletons. The C-19 methyl group can