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Selenium-77 nuclear magnetic resonance in mono- and disubstituted benzo[b]selenophenes

✍ Scribed by Marcel Baiwir; Gabriel Llabrès; Léon Christiaens; Jean-Louis Piette

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
252 KB
Volume
16
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^77^Se chemical shifts of 79 mono‐ or disubstituted benzo[b]selenophenes are reported. The results in the 2‐ and 3‐substituted derivatives closely parallel those previously obtained in the corresponding selenophenes. The measured parameters also correlate well with those measured in benzo[b]tellurophenes. The ^125^Te and ^77^Se chalcogen nuclei appear to be much more sensitive to substituent effects than the more classical nuclei. The effects of Cr(acac)~3~, Eu(dpm)~3~ and concentration on the ^77^Se NMR spectra are briefly discussed.

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