𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Downfield δ “Steric” shifts in the 13C NMR of acyclic molecules

✍ Scribed by John G Batchelor

Publisher
Elsevier Science
Year
1975
Weight
162 KB
Volume
18
Category
Article
ISSN
0022-2364

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

13C NMR of organosulfur compounds the 13
13C NMR of organosulfur compounds the 13C chemical shifts of monocyclic γ- and δ-sultones
✍ Michael B. Smith; Joseph Wolinsky 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 477 KB

## Abstract The ^13^C NMR spectra of several monocyclic γ‐sultones(1,2‐oxathiolane 2,2‐dioxides) and δ‐sultones(1,2‐oxathiane 2,2‐dioxides) have been determined and are presented herein. The chemical shifts of the ring carbons of these compounds are compared in terms of conformational, electronic a

13C NMR Studies: Effect of steric compre
13C NMR Studies: Effect of steric compression on chemical shifts of carbons in diastereoisomers
✍ Mahavir Prashad; M. Seth; A. P. Bhaduri; Avijit Banerji 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 148 KB 👁 1 views

## Abstract ^13^C NMR of diastereoisomeric pairs of 2,3‐diaryl‐2‐methylbutyronitriles revealed a difference in the chemical shift of the carbon atoms between the diastereoisomers and the observed shifts were greatly influenced by the presence of an __ortho__ substituent in the 3‐phenyl ring.

Increments for calculation of the 13C NM
Increments for calculation of the 13C NMR shifts of acetylated polyphenols considering steric interactions
✍ S. Wegner-Hambloch; K.-W. Glombitza 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 247 KB

Considerable deviations in the values obtained are an inherent deficiency in the calculation of 13C NMR chemical shifts of the polyphenolic phlorotannins from brown algae when using increments for mouosubstituted aromatic substances. In order to account for steric interactions within this class of c

Solvent sensitivity of ortho substituent
Solvent sensitivity of ortho substituent effect on 13C NMR chemical shift of the carboxyl carbon (δco) in benzoic acid
✍ Susanta K. Sen Gupta; Ruchi Shrivastava 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 190 KB 👁 1 views

A reverse __ortho__ effect is observed for the ^13^ C NMR chemical shifts of the carboxyl carbon (__δ__~co~) in benzoic acids measured in aprotic solvents of varying polarity. The __ortho__ effect on __δ__~co~ is best described by a combination of the reverse field and steric accelerating effects of