title: In situ time-resolved XAFS study of the reaction mechanism of bromobenzene homocoupling mediated by [Ni(cod)(bpy)].
abstract: A homocoupling reaction mechanism of bromobenzene mediated by the [Ni(cod)(bpy)] (cod = 1,5-cyclooctadiene; bpy = 2,2'-bipyridine) complex was investigated by means of in situ time-resolved X-ray absorption fine structure (XAFS) and factor analysis. A dimer intermediate [Ni(bpy)(Ph)Br](2) proposed in the previous studies by other groups is too dilute to observe with the XAFS technique; however, the structures and concentrations on the time course of a reactant [Ni(cod)(bpy)], an intermediate [Ni(bpy)(Ph)Br(dmf)(2)], and a byproduct [Ni(bpy)Br(2)(dmf)] during reaction are revealed by this combination.
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Asakura
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Shishido
authors.forename: Tsunehiro
authors.initials: T
authors.lastname: Tanaka
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D001969:Bromobenzenes / Q000737:chemistry*; D034242:Cyclooctanes / Q000737:chemistry*; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D013997:Time Factors; D056928:X-Ray Absorption Spectroscopy
chemical_list: D001969:Bromobenzenes; D034242:Cyclooctanes; C574195:Ni(cod)(bpy); D009942:Organometallic Compounds; D015082:2,2'-Dipyridyl; D009532:Nickel; C032036:bromobenzene