The reactions of 5-arylthianthreniumyl perchlorates with sodium hydrog
en selenide in ethanol and lithium n-butylselenolate in tetrahydrofura
n under nitrogen at reflux afforded bis[2-(2-arylthiophenylthio)phenyl
] selenides and 2-arylthio-2'-(n-butylseleno)diphenyl sulfides in 26 -
83% and 23 - 98% yields, respectively. A sulfurane mechanism is propo
sed.