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Determination of the E,Z configuration of alkenephosphonates by the use of vicinal 13C31P coupling constants

✍ Scribed by S. L. Spassov; L. Markova; D. M. Mondeshka; Ch. N. Tancheva; Ch. M. Angelov

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
216 KB
Volume
23
Category
Article
ISSN
0749-1581

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✦ Synopsis

The vicinal "C-"P couplings in the C--C==C-P fragment of alkenephosphonates (-8Hz for a cis-and -22Hz for a trans-orientation of the respective nuclei) are a reliable and convenient parameter for the determination of the EZ configuration of these and analogous compounds.

📜 SIMILAR VOLUMES

Dependence of vicinal 31P–31P and 31P–13
Dependence of vicinal 31P–31P and 31P–13C coupling constants on the dihedral angle of α, β-diphosphonates
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## Abstract Several α,β‐diphosphonates with a norbornane or cyclohexane skeleton were prepared, and the ^31^P‐^31^P coupling constants over three bonds for the ethyl or methyl esters, the acid and anion were obtained from the ^13^C NMR spectra or the ^13^C satellites in the ^31^P NMR spectra. The ^

Influence of the Z/E configuration on th
Influence of the Z/E configuration on the 13C15N coupling conditions 1J(13C15N) in aromatic azo and diazo compounds
✍ S. Simova; E. Fanghänel; R. Radeglia 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 417 KB

## Abstract The ^13^C NMR spectra of singly ^15^N‐labelled __Z__/__E__ isomers of azo and diazo compounds were recorded. The ^1^__J__(^13^C^15^N) coupling constants are strongly dependent on the geometrical configuration of the azo group, the relative position of the lone pair of electrons at the n