title: Conversion of carbon dioxide to oxalate by α-ketocarboxylatocopper(II) complexes.
abstract: The α-ketocarboxylatocopper(II) complex [{Cu(L1)}{O2CC(O)CH(CH3)2}] can be spontaneously converted into the binuclear oxalatocopper(II) complex [{Cu(L1)}2(μ-C2O4)] upon exposure to O2/CO2 gas. (13)C-labeling experiments revealed that oxalate ions partially incorporated (13)CO2 molecules. Furthermore, the bicarbonatocopper(I) complex (NEt4)[Cu(L1){O2C(OH)}] in an Ar atmosphere and the α-ketocarboxylatocopper(I) complex Na[Cu(L1){O2CC(O)CH(CH3)2}] in an O2 atmosphere were also transformed spontaneously into the oxalato complex [{Cu(L1)}2(μ-C2O4)].
authors.affiliation: Department of Chemistry, Ibaraki University , Mito, 310-8512 Ibaraki, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Takisawa
authors.forename: Yui
authors.initials: Y
authors.lastname: Morishima
authors.forename: Shoko
authors.initials: S
authors.lastname: Soma
authors.forename: Robert K
authors.initials: RK
authors.lastname: Szilagyi
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Fujisawa