𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Conformational studies on hexahelicenes—I: The NMR spectra of the benzohexahelicenes

✍ Scribed by W.H. Laarhoven And R.J.F. Nivard


Publisher
Elsevier Science
Year
1972
Tongue
French
Weight
417 KB
Volume
28
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Reassignment of NMR spectra and conforma
✍ Katia S. P. Perry; Eduardo Miguez; Mauro B. de Amorim; Maria Amelia D. Boaventur 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 106 KB

## Abstract We describe the reassignment of ^13^C NMR signals of goyazensolide based upon 1D and 2D techniques, and discuss its conformation and stereochemistry as obtained from the analysis of its proton spin–spin coupling constants, NOE measurements and molecular mechanics calculations using MM3\

Complete analysis of the 1H NMR spectra
✍ M. Rico; J. Santoro 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 736 KB

## Abstract The complete analysis of the ^1^H NMR spectra of the six acetylated glycals as well as that of tetra‐__O__‐acetyl‐2‐hydroxy‐D‐glucal has been carried out. The conformation of these compounds, as determined from the proton couplings (±0.05Hz) obtained, has been interpreted in terms of a

NMR and theoretical conformational studi
✍ Norma F. Santos-Sánchez; Martha S. Morales-Ríos; Pedro Joseph-Nathan 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 139 KB

## Abstract The NMR parameters of (−)‐physostigmine free base (1) in CD~2~Cl~2~, CDCl~3~ and DMSO‐__d__~6~ were used to determine stereospecific assignments. The vicinal homonuclear coupling constants exhibited by the internally diastereotopic pyrrolidinyl protons of the C‐ring can be interpreted a

The NMR spectra and conformations of cyc
✍ R. J. Abraham; F. H. Bottom; M. A. Cooper; J. R. Salmon; D. Whittaker 📂 Article 📅 1969 🏛 John Wiley and Sons 🌐 English ⚖ 366 KB 👁 1 views

The 220 MHz 'H spectra of isoverbanone, nopinone and verbanone are reported. The spectra of the first two are completely assigned but that of verbanone only partially. The coupling constants obtained provide information about the conformation of these molecules. The isoverbanone molecule is almost Y