6572-97-0Relevant academic research and scientific papers
?-BONDED DICATIONS FROM MEDIUM-SIZED SELENIUM AND TELLURIUM HETEROCYCLES
Fujihara, Hisashi,Furukawa, Naomichi
, p. 131 - 134 (2007/10/02)
The two-electron oxidation of 1,5-diselenacyclooctane (1) or 1,5-ditelluracyclooctane (3) with 2 equiv of NOBF4 gave the diselenide dication salt, 1,5-diselenoniabicyclooctane bis(tetrafluoroborate) (2), or the ditelluride dication salt 4.The structures of the dications were characterized by 77Se and 125Te NMR spectroscopy and X-ray crystallographic analysis.The diselenide dication salt 6 having aromatic ring was formed in the reaction of 5H,7H-dibenzodiselenocin 6-oxide (5) with 2 equiv of silylating reagent, CF3SO3SiMe3.These dications react either as an oxidant or as an electrophile depending on the added reagent.
Reactivity of Diselenide Dication Salt, 1,5-Diselenoniabicyclooctane Bis(hexafluorophosphate) toward Aromatics. A New Mode of Aromatic Substitution and Redox Reaction
Fujihara, Hisashi,Nakamura, Akiko,Akaishi, Ryouichi,Furukawa, Naomichi
, p. 393 - 396 (2007/10/02)
A new diselenide dication salt, 1,5-diselenoniabicyclooctane bis(hexafluorophosphate) was reacted with several aromatics to afford either the substitution or redox products.The reaction mode depends on the oxidation potential of aromatics.
CHEMICAL AND ELECTROCHEMICAL REDUCTION OF DISELENIDE DICATION SALT, 1,5-DISELENONIABICYCLOOCTANE BIS(HEXAFLUOROPHOSPHATE)
Fujihara, Hisashi,Akaishi, Ryouichi,Nakamura, Akiko,Furukawa, Naomichi
, p. 6375 - 6378 (2007/10/02)
The reaction of the diselenide dication salt, 1,5-diselenoniabicyclooctane bis(hexafluorophosphate) (1) with 1,5-diselenacyclooctane (2) gave the corresponding cation radical by single-electron transfer.The dication salt 1 was reduced upon treatment with fluorenyl-lithium, Na2S, NaBH4; it did not deprotonate.The cyclic voltammetry of 1 shows the reversible reduction peak at remarkably low reduction potential.
