A new medium-sized heterocycle, 5H,7H-dibenzo[b,g][1,5]diselenocine 1, has been synthesized; the reaction of the selenoxide of 1 with two equivalents of CF3SO3SiMe3 gave the stable diselenide dication salt, this is a new method for the preparation of the diselenide dication.
H. Fujihara, Y. Ueno, J. Chiu and N. Furukawa, J. Chem. Soc., Chem. Commun., 1991, 1052 DOI: 10.1039/C39910001052
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