Substitution effects and parameters of PMR spectra of the benzene ring in trialkylphenoxysilanes, trialkylphenoxygermanes, and trialkylphenoxystannanes
β Scribed by L. B. Krivdin; G. A. Kalabin; R. G. Mirskov; N. K. Yarosh; M. G. Voronkov
- Book ID
- 112447289
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 269 KB
- Volume
- 31
- Category
- Article
- ISSN
- 1573-9171
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From the theory of chemical shifts, substituent-induced ring proton shifts should depend primarily on the n-electron charge density of the carbon atom to which the proton is bound assuming substituent-independence of the ring current effect and minimal long range substituent effects for meta and par
C(4), CΠ(2)-Double substitution was achieved in good yields by reacting 3-arylsydnones with BuLi and then with a suitable electrophile in THF at β«05Χβ¬ΠC. α§ 1998 John Wiley & Sons, Inc. Heteroatom Chem 9:549-552, 1998 1 H NMR d 7.41-7.52 (m, 20H, Ar-H), 7.76-7.84 (m, 3H, Ar-H); IR 1723 (m CO ) cm β«1Χ