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A Series of Dinuclear Copper Complexes Bridged by Phosphanylbipyridine Ligands: Synthesis, Structural Characterization and Electrochemistry
European Journal of Inorganic Chemistry (2013)
  • Kyle A Grice
Abstract

The phosphanylbipyridine ligands 6-(diphenylphosphanyl)-4,4′-dimethyl-2,2′-bipyridine (PPh2-Me2-bipy, a), 4,4′-di-tert-butyl-6-(diphenylphosphanyl)-2,2′-bipyridine (PPh2-tBu2-bipy, b), and 6-(diisopropylphosphanyl)-2,2′-bipyridine (PiPr2bipy, c) and the corresponding dinuclear copper complexes [Cu2(μ-PPh2-Me2-bipy)2(NCCH3)2](PF6)2 (1), [Cu2(μ-PPh2-tBu2-bipy)2(NCCH3)2](PF6)2 (2), [Cu2(μ-PiPr2bipy)2(μ-NCCH3)](PF6)2 (3), and [Cu2(μ-PiPr2bipy)2{μ-CNCH(CH3)2}](PF6)2 (4) were synthesized. The X-ray structures of 1–4 show that the complexes are dinuclear with the bidentate bipyridine coordinating to one copper atom and the phosphane moiety coordinating the other copper center. Complexes 3 and 4 possess short Cu–Cu distances with bridging acetonitrile and isocyanide ligands. The cyclic voltammograms of 1–4 were examined under N2 and CO2. Under N2, 1–3 show four quasi-reversible 1e– reductions, and under CO2, they show current enhancement at the second reduction. In comparison, complex 4 shows four irreversible reductions under N2 and no current enhancement under CO2.

Disciplines
Publication Date
2013
Citation Information
Kyle A Grice. "A Series of Dinuclear Copper Complexes Bridged by Phosphanylbipyridine Ligands: Synthesis, Structural Characterization and Electrochemistry" European Journal of Inorganic Chemistry Vol. 2013 Iss. 22-23 (2013)
Available at: http://works.bepress.com/kyle_grice/2/