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Substituent parameters v. Lanthanide-induced shifts in the interpretation of the 13C nuclear magnetic resonance spectrum of 5,5-dimethyl-2-norbornanone

✍ Scribed by Peter Yates; Dong Dao Cong

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
177 KB
Volume
20
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Earlier assignments of ^13^C NMR signals to C‐6 and C‐7 in 5,5‐dimethyl‐2‐norbornanone (1) based on lanthanide‐induced shifts are interchanged on the basis of studies of deuterium‐labeled derivatives of 1. The revised assignments are in accord with predictions based on substituent parameters.

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Investigation of benzimidazoles. III—tra
Investigation of benzimidazoles. III—transmission of the substituent effects in 2-substituted 1-methylbenzimidazoles studied by 13C nuclear magnetic resonance
✍ V. A. Lopyrev; L. I. Larina; T. I. Vakul'skaya; E. F. Shibanova; I. A. Titova; M 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 394 KB

## Abstract The influence of substituents on the ^13^C NMR chemical shifts of 2‐substituted 1‐methylbenzimidazoles has been investigated. The electronic effects of the substituents are transmitted to C‐4 and C‐7 mainly by the resonance mechanism, and to C‐5, C‐6 and __N__‐CH~3~, by approximately eq