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• W2069593496 startingPage "7415" @default.
• W2069593496 abstract "The reaction of [UO2(Ar2nacnac)Cl]2 [Ar2nacnac = (2,6-iPr2C6H3)NC(Me)CHC(Me)N(2,6-iPr2C6H3)] with Na(RC(O)CHC(O)R) (R = Me, Ph, CF3) in tetrahydrofuran results in the formation of UO2(Ar2nacnac)(RC(O)CHC(O)R) (R = Me, 1; Ph, 2; CF3, 3), which can be isolated in moderate yields. The structures of 1 and 2 have been confirmed by X-ray crystallography, while the solution redox properties of 1−3 have been measured by cyclic voltammetry. Complexes 1−3 exhibit reduction features at −1.82, −1.59, and −1.39 V (vs Fc/Fc+), respectively, at a scan rate of 100 mV·s−1. The decrease in the reduction potential follows the electron-withdrawing ability of each β-diketonate ligand. Chemical reduction of 1 and 2 with Cp*2Co in toluene yields [Cp*2Co][UO2(Ar2nacnac)(RC(O)CHC(O)R)] (R = Me, 4; Ph, 5), while reduction of 3 with Cp2Co provides [Cp2Co][UO2(Ar2nacnac)(CF3C(O)CHC(O)CF3)] (6). Complexes 4−6 have been fully characterized, while the solid-state molecular structure of 5 has also been determined. In contrast to the clean reduction that occurs with Cp*2Co, reduction of 1 with sodium ribbon, followed by cation exchange with [NEt4]Cl, produces [NEt4][UO2(Ar2nacnac)(H2C═C(O)CH(O)CMe)] (7) in modest yield. This product results from the formal loss of H• from a methyl group of the acetylacetonate ligand. Alternately, complex 7 can be synthesized by deprotonation of 1 with NaNTMS2 in good yield." @default.
• W2069593496 created "2016-06-24" @default.
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• W2069593496 date "2008-07-17" @default.
• W2069593496 modified "2023-10-02" @default.
• W2069593496 title "Mixed-Ligand Uranyl(V) β-Diketiminate/β-Diketonate Complexes: Synthesis and Characterization" @default.
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• W2069593496 doi "https://doi.org/10.1021/ic800778j" @default.
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