title: Anionic Bismuth-Oxido Carboxylate Clusters with Transition Metal Countercations.
abstract: Six new anionic bismuth-oxido clusters containing trifluoroacetate ligands were prepared. These include two new Bi6O8clusters: [M(NCMe)2(H2O)4]3[Bi6(μ3-O)4(μ3-OH)4(CF3CO2)12] with an octahedral Bi6O4(OH)4core (M = Ni, 1a; Co, 1b) and four Bi4O2clusters, {[Co(NCMe)6][Bi4(μ3-O)2(CF3CO2)10]}n(2a), {[Co{HC(MeCO)2(MeCNH)}2][Bi4(μ3-O)2(CF3CO2)10]·2[CF3CO2]·2[CF3CO2H]·2[H2O]}n(2b), {[Cu(NCMe)4]2[Bi4(μ3-O)2(CF3CO2)10]·2[CF3CO2H]}n(2c), and {[Me4N]2[Bi4(μ3-O)2(CF3CO2)10]·2[CF3CO2H]}n(2d). These are among the first bismuth-oxido anionic clusters synthesized, and the first to have transition metal countercations. The Bi6O8anion in 1a and 1b is a high-symmetry octahedron. Additionally, two of the new Bi4O2clusters are arranged in 1D polymeric structures via bridging carboxylate ligands. The cation in compound 2c had not been previously characterized and was also observed in the synthesis of [Co{HC(MeCO)2(MeCNH)}2][Bi(NO3)6] (3). The new compounds were characterized using single crystal X-ray crystallography and elemental analysis.
authors.affiliation: Chemistry Department, Rice University , 6100 Main St. MS-60, Houston, Texas 77005, United States.
authors.forename: Ismael I
authors.initials: II
authors.lastname: Loera Fernandez
authors.affiliation: Chemistry Department, Rice University , 6100 Main St. MS-60, Houston, Texas 77005, United States.
authors.forename: Samantha L
authors.initials: SL
authors.lastname: Donaldson
authors.affiliation: Chemistry Department, Rice University , 6100 Main St. MS-60, Houston, Texas 77005, United States.
authors.forename: Desmond E
authors.initials: DE
authors.lastname: Schipper
authors.affiliation: Chemistry Department, Rice University , 6100 Main St. MS-60, Houston, Texas 77005, United States.
authors.forename: Sohaila
authors.initials: S
authors.lastname: Andleeb
authors.affiliation: Chemistry Department, Rice University , 6100 Main St. MS-60, Houston, Texas 77005, United States.
authors.forename: Kenton H
authors.initials: KH
authors.lastname: Whitmire