Please use this identifier to cite or link to this item:
|Title:||Room-temperature hydrodebromination of 4,4'-dibromobiphenyl catalyzed by 1,1'-bis(diphenylphosphino) ferrocene complexes of palladium|
|Source:||Wei, B., Hor, T.S.A. (1998-06-15). Room-temperature hydrodebromination of 4,4'-dibromobiphenyl catalyzed by 1,1'-bis(diphenylphosphino) ferrocene complexes of palladium. Journal of Molecular Catalysis A: Chemical 132 (2-3) : 223-229. ScholarBank@NUS Repository. https://doi.org/10.1016/S1381-1169(97)00274-4|
|Abstract:||Hydrodebromination of 4,4'-dibromobiphenyl to 4-bromobiphenyl and biphenyl was studied by using a variety of metal complexes of Ru(II), Ni(II), Pd(II), Pt(II) and Cu(I) under different ligand environments. Palladium complexes are most effective in giving biphenyl whereas other complexes give 4-bromobiphenyl. 1,1'-Bis(dipbenylphosphino)ferrocene (dppf) is the best phosphine ligand whereas NaBH4 and N,N,N',N'-tetramethylethylenediamine are the best reductant and base, respectively. The use of catalytic PdCl2(CH3CN)2 and PdCl2(dppf) gives 4-bromobiphenyl (86%) and bipbenyl (100%) respectively. PdCl2(dppf) is effective even at a low concentration of 3.5 mol.% and at room temperature (r.t.) with a short reaction time (10 min) and performs better than Pd on charcoal (5%). It also leads to a complete breakdown of 4-monobromobiphenyl and decabromobiphenyl giving 100% of biphenyl in 4 min and 40 h, respectively.|
|Source Title:||Journal of Molecular Catalysis A: Chemical|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 17, 2018
WEB OF SCIENCETM
checked on Nov 22, 2017
checked on Jan 14, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.