139526-19-5

Upstream product

• 139526-25-3 C₁₆H₁₄Se₃⁽²⁺⁾*2F₆P^(1-) 
• 108-98-5 thiophenol 

Relevant academic research and scientific papers

New cyclic dichalcogenonio-selenuranes induced by transannular multichalcogenides participation

The significant conformational changes was found when cyclic chalcogenides, 1,11-(methanoselenomethano)-5H,7H-dibenzo[b,g][1,5]diselenocin (1) and 1,11-(methanothiomethano)-5H,7H-dibenzo[b,g][1,5]selenathiocin (3), were dissolved in concentrated H2SO4; i.e., the twin-chair forms of 1 and 3 in CHCl3 were converted completely into the twin-boat forms of the selenurane dications 2 and 4 in H2SO4. Two-electron oxidation of 1 or 3 with 2 equiv of NOPF6 gave the cyclic selenurane dication 2PF6- salt 2a or 4a which contains two selenonium or two sulfonium cations at the apical positions. The selenurane 2a or 4a could be reduced readily to neutral 1 or 3 upon treatment with PhSH, Ph3P, phenothiazine, or SmI2; that is, 2a or 4a acts as an oxidizing agent.