Bulletin of the Chemical Society of Japan p. 1661 - 1664 (1983)
Update date:2022-08-30
Topics:
Nakanishi
Ikeda
Long-range coupling constants between **7**7Se and **1**3C in selenoanisole, diphenyl selenide, diphenyl diselenide, and their 2-mono- and 2,2 prime -disubstituted derivatives, selenoxanthone, selenanthrene, dichlorides, and selenoxides were measured to disclose predominant factors governing the magnitude of the coupling. Extraordinary large values for two- and three-bond couplings are found in selenoxanthone. Three factors are operative: the orientational effect, the coordination number, and the effect of ring formation. The last factor accompanies a stronger inverse effect on the coupling of selenoxides than on that of selenides.
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