Etude par resonance magnetique nucleaire de composes organiques contenant des chalcogenes: Partie IV. Le disulfure de diphényle et ses analogues sélénié et telluré

NMR measurements (¹H, ¹³C, ⁷⁷Se) of diphenyl dichalcogenides are reported. They confirm the molecular conformation deduced from other physical experiments. Steric inhibitions are responsible for the conformation in the Te compound, while, in the S and Se compounds, the heteroatom lone pairs interact to some extent with the π systems of the rings.More fundamental discussions of the measured parameters are made, including the somewhat controversial existence of the title compounds in solution.