𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Application of the method CORDAL based on the combination of the convolution molecule method and the residual analysis to the structure determination of 3-dehydro gibberellin A3

✍ Scribed by Dr. L. Kutschabsky; Dr. G. Reck; Dr. S. Kulpe; Dr. E. Höhne


Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
502 KB
Volume
10
Category
Article
ISSN
0232-1300

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

In connection with studies of the solid state photolysis the crystal and molecular structure of 3‐dehydro gibberellin A~3~ was determined by X‐ray analysis. The final discrepancy factor R was 0.078. The packing of the molecules in the crystal explains the preference of intramolecular photoaromatization in contrast to the topophotodimerisation of the corresponding methylester upon UV‐irradiation. In this structure determination the method CORDAL, based on the combination of the convolution molecule method by Hoppe and Paulus and the residual analysis, was applied successfully.


📜 SIMILAR VOLUMES


Combination of the convolution molecule
✍ Dr. G. Reck; Dr. L. Kutschabsky; Chr. Krause 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 213 KB 👁 2 views

## Abstract The convolution molecule method by Hoppe and Paulus yields sometimes several solutions for the orientation of the molecule. For the selection of the correct orientation a special kind of __R__ value (mean __R__ value) can give valuable information.

A quantitative application of the J-base
✍ Gary J. Sharman 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 199 KB

## Abstract An example of the use of the __J__‐based configuration analysis method to determine relative stereochemistry of a small molecule related to reboxetine is described. This study was complicated by the fact that the molecule did not exhibit __J__‐couplings and NOEs consistent with a single

Fluorimetric determination of chromium a
✍ A. Cabrera-Martín; J.S. Durand; S. Rubio-Barroso 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 359 KB

The method is based on a 1:l Cr(VI)/3-hydroxyflavone complex which is extracted into benzene at H,, = -0.6. The complex has a pK\* value of 7.8 f 0.1. Chromium is determined in the range 10-650 ng ml-' with excitation at 368 nm and emission measurement at 530 nm. The relative standard deviation is 6

A multiresolution-based method for the d
✍ Jorge Núñez; Xavier Otazu; María Teresa Merino 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 618 KB

Spatial resolution is a key parameter of all kind of images. This is of particular importance in fields as, for example, medicine or remote sensing. The nominal resolution of a positron emission tomography (PET) or nuclear magnetic resonance (NMR) scanners are directly related to the size, number, a