𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Structural examination of some polychlorinated 2-phenoxyphenols by 1H and 13C nuclear magnetic resonance

✍ Scribed by Bo Nordén; Ulf Edlund; Carl-Axel Nilsson

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
465 KB
Volume
13
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Carbon‐13 NMR spectra of some polychlorinated 2‐phenoxyphenols have been obtained. The substituent chemical shifts obtained by varying the chlorine substitution pattern of one ring are very similar to those reported for the corresponding diphenyl ethers. Thus, the replacement of a 2‐chlorine atom by a hydroxyl group only induces minor shielding changes at the adjacent aryl moiety and the ^13^C chemical shift changes are mainly determined by the preferred conformations governed by the steric demand of the ortho substituents. An ^1^H NMR/IR study revealed an equilibrium between intermolecular aggregates and intramolecular OH…π species in the concentration interval 2‐0.005 M. Any hydrogen bonding effects on ^13^C NMR shieldings are, therefore, minor compared to shielding variations caused by steric perturbations.

📜 SIMILAR VOLUMES

Carbon-13 nuclear magnetic resonance spe
Carbon-13 nuclear magnetic resonance spectra of some methyl and phenyl substituted 2H-azirines
✍ Kazuaki Isomura; Hiroshi Taniguchi; Masaaki Mishima; Mizue Fujio; Yuho Tsuno 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 340 KB

## Abstract Carbon‐13 n.m.r. spectra have been obtained for some methyl and phenyl substituted 2__H__‐azirines. The higher field resonance of C‐2 than that of the corresponding aziridine carbon is interpreted in terms of ring strain. Substituent effects on the chemical shifts of the azirine ring ca

1H and 13C nuclear magnetic resonance st
1H and 13C nuclear magnetic resonance studies of pyrazolo [c]- and pyrazolo [b]phenothiazines
✍ G. Boyer; J. P. Galy; R. Faure; J. Barbe 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 224 KB

## Abstract The complete assignment of the ^1^H and ^13^C NMR spectra of eight Pyrazolo[__b__]‐ and pyrazolo[__c__]phenothiazines was performed using ^1^H detected one‐bond heteronuclear multiple quantum coherence (HMQC) and long‐range (two and three bonds) heteronuclear multiple quantum bond conne

Configurational assignment of β-phenylas
Configurational assignment of β-phenylaspartic acids in solution by 1H and 13C nuclear magnetic resonance
✍ M. Barrelle; C. Gey; C. G. Béguin 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 345 KB

Vicinal 3J(HH) and 3J( 13CH) coupling constants are reported for the two diastereoisomers of p-pbenylaspartic acid at various pH values. A comparison between these coupling constants and those expected from the possible conformations of these molecules allows configurational assignments to be made.

The synthesis and the 1h- and 13c-nuclea
The synthesis and the 1h- and 13c-nuclear magnetic resonance spectroscopy of the cyclic sulfites of some sugars
✍ Yueh Wang; Harry P.C. Hogencamp 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 490 KB

## ABs-rFtAcT Treatment of methyl j?-D-ribofuranoside with thionyl chloride in hexamethylphosphoric triamide gives two diastereoisomeric methyl 5-chloro-5-deoxy-/3-D-ribofuranoside 2,3-cyclic sulfites. Similar cyclic sulfites are formed from benzyl B-Dribofuranoside and 1,4-anhydro-IX.-ribitol. If