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Conformational Coupling between Ring A and Ring B in Isobacteriochlorins

✍ Scribed by Dr. Christoph Kratky; Dipl. Naturwiss. EIH Christof Angst; Dr. Jon Eigill Johansen

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
251 KB
Volume
20
Category
Article
ISSN
0044-8249

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✦ Synopsis

From Table 3 it can be seen that the values of e n @ ) decrease with increasing atomic number of the lanthanoid element, and in this way a similar "magnetochemical series" for the central ions also follows, which corresponds to the pattern of the "lanthanoid contraction".

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Ring a conformation in steroids. 3β€”Cyclo
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✍ Kirk Marat; J. F. Templeton; Yangzhi Ling; Weiyang Lin; R. K. Gupta πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 882 KB

## Abstract Proton and carbon NMR data are provided for 21 ring A and ring B cyclosteroids and cyclopropano (or methylene) steroids. Shift assignments were made using standard 2D NMR techniques, while ring A proton subspectra were extracted with a 1D TOCSY experiment. Coupling constants were obtain