𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Hydroxy group substituent effects on 1H NMR chemical shifts in the structural elucidation of spirostanes

✍ Scribed by Jaffer A. Jaffer; Trevor A. Crabb; Christopher H. Turner; Gerald Blunden

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
312 KB
Volume
21
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Substituent effects on the 13C NMR chemi
Substituent effects on the 13C NMR chemical shifts of 1-hydroxyalkylphosphonic acids
✍ Zdzisław Glowacki; Maria Hoffmann 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 208 KB

## Abstract ^13^C chemical shifts and ^31^P,^13^C coupling constants are reported for nine 1‐hydroxyalkylphosphonic and two additional phosphonic acids. The α‐substituent‐induced chemical shifts (α‐SCS) of the phosphonate group were calculated and their non‐additivity was observed. Good linear corr

The anisotropic effect of 4-substituents
The anisotropic effect of 4-substituents on the 1H NMR chemical shift of H-5 in phenanthrenes
✍ R. M. Letcher 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 359 KB

## Abstract Chloro‐, methoxy‐ and methyl‐substituents in the 4‐position of phenanthrenes exert a profound and diagnostic influence on the ^1^H chemicalshift of H‐5, and from ^13^C measurements it is considered to be dueto an anisotropic effect.

Reinvestigation of the substituent effec
Reinvestigation of the substituent effects of fluorine on the 1H NMR chemical shifts of the adjacent methylene group in fluorinated [2.2]paracyclophanes
✍ Ludger Ernst; Kerstin Ibrom 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 73 KB 👁 2 views

Introduction of a fluorine substituent into an aromatic ring of [2.2]paracyclophane causes distinct shielding and deshielding effects at the anti -and syn-protons, respectively, of the adjacent bridge methylene group. A recent contradictory claim in the literature was disproved by 2D H,H-NOESY, long

Structural investigation on phenyl- and
Structural investigation on phenyl- and pyridin-2-ylamino(methylene)naphthalen-2(3H)-one. Substituent effects on the NMR chemical shifts
✍ Taracad K. Venkatachalam; Gregory K. Pierens; Marc R. Campitelli; David C. Reute 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 195 KB

## Abstract Schiff bases bearing phenyl and pyridyl groups were synthesized by condensation of appropriate amines with 2‐hydroxynaphthaldehyde. These Schiff bases were obtained as colored crystalline solids. The proton NMR spectra of these compounds showed a doublet for the NH protons indicating a

1H chemical shifts in NMR: Part 23, the
1H chemical shifts in NMR: Part 23, the effect of dimethyl sulphoxide versus chloroform solvent on 1H chemical shifts
✍ Raymond J. Abraham; Jonathan J. Byrne; Lee Griffiths; Manuel Perez 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 220 KB

## Abstract The ^1^H chemical shifts of 124 compounds containing a variety of functional groups have been recorded in CDCl~3~ and DMSO‐__d__~6~ (henceforth DMSO) solvents. The ^1^H solvent shift Δδ = δ(DMSO) − δ(CDCl~3~) varies from −0.3 to +4.6 ppm. This solvent shift can be accurately predicted (