title: Which one is faster? A kinetic investigation of Pd and Ni catalyzed Negishi-type oxidative coupling reactions.
abstract: The difference between Pd and Ni has been investigated based on the Negishi-type oxidative coupling reactions in which reductive elimination was proved to be the rate determining step. Although DFT calculations illustrate that the Pd catalyzed reaction should be faster than the Ni catalyzed reaction under these conditions, kinetic experiments indicate that the reaction rate of Pd and Ni is dependent on the concentration of the catalyst precursor. The Pd catalyzed reaction is faster than the Ni catalyzed reaction only when the precursor concentration is as low as 1 × 10(-7) M.
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei 430072, P. R. China. aiwenlei@whu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Xin
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei 430072, P. R. China. aiwenlei@whu.edu.cn and Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei 430072, P. R. China. aiwenlei@whu.edu.cn and Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Deng
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei 430072, P. R. China. aiwenlei@whu.edu.cn.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei 430072, P. R. China. aiwenlei@whu.edu.cn and State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai, 200032, P. R. China.
authors.forename: Aiwen
authors.initials: A
authors.lastname: Lei
mesh_terms: D002384:Catalysis; D007700:Kinetics; D008024:Ligands; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D058451:Oxidative Coupling; D010165:Palladium / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D008024:Ligands; D010165:Palladium; D009532:Nickel