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• W2017347157 abstract "The synthesis, characterization, and thermal behavior of the dicopper(I) oxalate complexes L2Cu2O4C2 (L = Me3SiC⋮CSiMe3 (1), Me3SiC⋮CnBu (2), EtC⋮CEt (3), H2CC(H)SiMe2tBu (4), H2CC(H)SiEt2Me (5), norbornene (6)) is reported. All complexes can be prepared in a straightforward manner by the reaction of stoichiometric amounts of Cu2O and oxalic acid with 2 equiv of the respective alkyne or alkene. The complexes are stable at room temperature, and in solid form they can be handled in air for some time. Their thermal behavior was studied by thermal gravimetric analysis (TGA). The order of thermal stability was found to be 1 > 6 > 4 > 2 ≈ 3 > 5. Decomposition starts between 50 and 100 °C and is completed between 300 and 350 °C. All compounds fully decompose via an efficient internal redox process to give elemental copper, CO2, and the free alkyne or alkene ligands, which makes these new complexes promising precursors for copper deposition (in the case of 4, it is likely that H2CC(H)SiMe2H and isobutene is formed via β-hydrogen elimination from H2CC(H)SiMe2tBu). Distinct two- or three-step decomposition sequences for the individual complexes are revealed by the TGA analyses and are discussed. The single-crystal X-ray structures of 1 and 3 are reported, which are the first for copper(I)/oxalato compounds. Both complexes exhibit the anticipated planar dinuclear structure with the oxalate in a μ-1,2,3,4 bridging mode and the alkynes or alkenes as capping ligands." @default.
• W2017347157 created "2016-06-24" @default.
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• W2017347157 date "2003-09-30" @default.
• W2017347157 modified "2023-09-23" @default.
• W2017347157 title "Dicopper(I) Oxalate Complexes Stabilized by Lewis Bases: Potential Precursors for Copper Deposition" @default.
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• W2017347157 doi "https://doi.org/10.1021/om0303653" @default.
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