𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The stereochemical dependence of δ-substituent effects in 13C NMR spectra. Deshielding syn-axial interactions

✍ Scribed by S.H Grover; J.Peter Guthrie; J.B Stothers; C.T Tan


Publisher
Elsevier Science
Year
1973
Weight
247 KB
Volume
10
Category
Article
ISSN
0022-2364

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


A comment on the interpretation of 13C n
✍ G. Engelhardt; H. Jancke; D. Zeigan 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 237 KB

## Abstract An alternative explanation for δ‐__syn__‐axial substituent effects of ^13^C chemical shifts is given using the concept that the δ‐__syn__‐axial interaction in the substituted compound replaces the γ‐__gauche__ interaction in the parent molecule. The application of this principle to subs

DFT–GIAO–NBO and 13C NMR study of the δ-
✍ B. Mikhova; B. Stamboliyska; A. Koch; H. Duddeck; E. Kleinpeter 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 105 KB

## Abstract Six groups of diastereomeric 2,4‐disubstituted adamantanes were studied with DFT–GIAO–NBO (natural orbital analysis) methods. The calculated ^13^C chemical shifts reproduce well the experimental data. It was found that among all diastereomers, those bearing substituents in δ‐__syn__‐axi

Substituent effects in the 13C NMR spect
✍ Peter E. Hammann; Elke Wöbbecke; Hans-Otto Hoppen 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 247 KB

## Abstract The ^13^C NMR spectra of eight norethisterone derivatives are presented. Substituent chemical shifts for the methyl group at C‐18, the methylene group at C‐11 and the Δ^15^ double bond are evaluated and discussed.

Long range substituent effects relfected
✍ Ernest Wenkert; Miroslav J. Gašić; Edward W. Hagaman; L. D. Kwart 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 282 KB 👁 1 views

## Abstract Acylation of allyl alcohols induces strong carbon shifts, shielding γ and deshielding δ effects. These shifts are a consequence of through‐bond polarization of the olefinic carbons. Allyl ethers show similar, but milder perturbations. The olefinic carbon shifts reveal a strong concentra