Premium
Air Oxidation of Benzene to Biphenyl – A Dual Catalytic Approach
Author(s) -
Mukhopadhyay Sudip,
Rothenberg Gadi,
Lando Gilad,
Agbaria Kasim,
Kazanci Murat,
Sasson Yoel
Publication year - 2001
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/1615-4169(200107)343:5<455::aid-adsc455>3.0.co;2-o
Subject(s) - chemistry , catalysis , biphenyl , benzene , palladium , oxygen , solvent , dual role , photochemistry , inorganic chemistry , combinatorial chemistry , organic chemistry
Facile oxidative homocoupling of benzenes to the respective biphenyls is effected under moderate conditions, using air or oxygen in the presence of catalytic PdCl 2 and AcOH/AcONa as solvent. The fast regeneration of the active Pd 2+ species is accomplished by combining several oxygen‐binding catalysts, such as Zr(IV), Mn(II), and Co(II) acetates. In this way, it is possible to increase the content of active oxygen in solution so that the rate of catalyst regeneration is faster than the rate of aggregation of the „spent catalyst”, Pd(0), to palladium black. The effects of various process parameters are studied and some mechanistic implications are discussed.