Selenium-77 NMR. 2. The basis for application of JSe-Se and JSe-H in structure assignments of mono-, di-, and triseleno-substituted alkenes

I Johannsen, L Henriksen, H Eggert

Index: Johannsen, Ib; Henriksen, Lars; Eggert, Hanne Journal of Organic Chemistry, 1986 , vol. 51, # 10 p. 1657 - 1663

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Citation Number: 61

Abstract

Series of isomeric mono-, di-, and triseleno-substituted alkenes have been synthesized and subjected to I7Se NMR analysis. In di-and triselenesubstituted alkenes stereochemical assignments were obtained by measurements of 77Se-77Se coupling constants. Values between 117-77 Hz for cis 3J~ e-~ e, 55-19 Hz for 2J~ e~ e, and 12-2 Hz for trans 3Jbse were found. A large body of vinylic 77Se-1H coupling constants has been obtained in di- ...

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