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Debromination of diphenyl methane bromide by sodium dithionite using viologen polymer as electron-transfer catalyst

โœ Scribed by Futian Liu; Xianda Yu; Shuben Li

Book ID
103077244
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
169 KB
Volume
30
Category
Article
ISSN
0014-3057

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โœฆ Synopsis

The behavior of a viologen polymer (PV 2+ ) as electron-transfer catalyst in the debromination of diphenyl methane bromide (Ph2CHBr) was studied. It was found that Ph2CHBr could be reduced at room temperature by sodium dithionite to afford tetraphenyl ethane in good yields. A mechanism for the debromination of Ph2CHBr was proposed.

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Convenient reduction of azobenzenes and azoxybenzenes to hydrazobenzenes by sodium dithionite using dioctylviologen as an electron transfer catalyst
โœ Kwanghee Koh Park; Sun Young Han ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 221 KB

Various azohenzenes and azoxy~nzenes were reduced almost quantitatively to the corresponding hydrazohenzenes by sodium dithionite under mild conditions without the formation of aniline derivatives, using dioetyl vioiogen as an electron-transfer catalyst in acetouitrile-water.