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Determination of relative signs of 13C13C coupling constants in doubly labelled compounds

✍ Scribed by P. E. Hansen; O. K. Poulsen; A. Berg


Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
187 KB
Volume
7
Category
Article
ISSN
0749-1581

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✦ Synopsis


Abstract

Analysis of the noise decoupled ^13^C spectra of doubly ^13^C labelled compounds where the two labelled carbons are identical, makes the determination of reltive signs of ^13^C^13^C coupling constants possible in a very simple way. The involved carbon form AA'X or AA'B spin systems.


📜 SIMILAR VOLUMES


13C13C coupling constants in derivatives
✍ P. E. Hansen; O. K. Poulsen; A. Berg 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 493 KB

## Abstract Magnitudes and signs of ^13^C^13^C coupling constants in compounds of the type Ph^13^CR^1^R^2^^13^CR^1^R^2^Ph have been determined and the results are discussed in a broader context. Two types of coupling constants, __J__(C‐i, C‐α) and __J__(C‐i, C‐β), between aromatic carbon atoms an

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✍ P. E. Hansen; O. K. Poulsen; A. Berg 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 302 KB

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Determination of and Coupling Constants
✍ Weidong Hu; Serge Bouaziz; Eugene Skripkin; Abdelali Kettani 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 83 KB

A novel 1 H-13 C correlated two-dimensional experiment, CT-HMQC-J, for the measurement of three-bond proton-phosphorus coupling constants in 13 C-labeled DNA is described. The experiment is based on the intensity difference of 1 H-13 C cross peaks in the presence and absence of the proton-phosphorus

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✍ Ernest W. Della; Wit K. Janowski; Bruno Kasum; K. Paul Kirkbride; Neil J. Shirle 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 332 KB

## Abstract Measurement of the ^13^C NMR spectra of the bridgehead nitro compounds __1a–5a__ has been performed. It is found that one‐bond ^13^C^15^N coupling is not necessarily a reflection of the degree of s character of the bridgehead carbon exocyclic bonding orbital. Although the magnitude of

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✍ Michael Stöcker 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 418 KB

## Abstract The smallest one‐bond carbon—carbon coupling constants of cyclopropane derivatives have been measured for [1‐^13^C]cyclopropane‐1,1‐dicarboxylic acid and cyclopropanecarboxylic acid. The ^13^C, ^13^C coupling constants of cyclopropylcarbinol have also been determined. The dependence of