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- W3004964911 abstract "Abstract Five γ-substituted acetylacetone derivatives (i.e. sterically large R3 substituents on the C3 position of acetylacetone H3C-CO-CHR3-CO-CH3 with R3 = HO-Ph-COO, L1, HO-Ph-CH=CH-COO, L2, H21C10O-Ph-COO, L3, H21C10O-Ph-COO-Ph-COO, L4, and H21C10O-Ph-CH=CH-COO-Ph-COO, L5, were synthesised and complexed to copper(II) in order to study the electrochemical behaviour of both ligands L1–L5 and their bis(β-diketonato)copper(II) complexes 1–5. It was found that the reduction of L1–L5 and 1–5 span over a range of 0.23 V and 0.08 V respectively. Reduction of ligands L1–L5 occured at a potential ca. 0.9 V more negative than the CuII/I reduction of their respective complexes 1–5, but at a similar potential than the second reduction of complexes 3 and 5, suggesting that the second reduction of 3 and 5 is ligand based instead of copper based, as was observed for the parent complex bis(acetylacetonato)copper(II). This also is in agreement with frontier molecular orbital results. The various sterically large γ-substituents on the β-diketonato ligands L1–L5 have a similar electronic influence on the CuII/I reduction potentials of their complexes 1–5, namely a potential shift of ca. 0.1 V more positive than the CuII/I reduction of the parent complex bis(acetylacetonato)copper(II)." @default.
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- W3004964911 date "2020-03-01" @default.
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- W3004964911 title "Electrochemical behaviour of bis(β-diketonato)copper(II) complexes containing γ-substituted β-diketones" @default.
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- W3004964911 doi "https://doi.org/10.1016/j.jelechem.2020.113929" @default.
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