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A Minimalist Approach to C-H Activation by Copper

Dunn, Nichola
Published in Helvetica chimica acta. 2006, vol. 89, no. 5, p. 841-853
Abstract The complex [Cu₂(1)₂]²⁺ (1 = 1,3‐bis(1‐methyl‐1H‐benzimidazol‐2‐yl)benzene) undergoes slow oxidation by dioxygen in DMF solution to give the hydroxylated product [Cu₂(2‐H)₂]²⁺ (2 = 2,6‐bis(1‐methyl‐1H‐benzimidazol‐2‐yl)phenol) characterized by an X‐ray crystal‐structure analysis. The oxidation occurs much faster when CuII is mixed with 1 in the presence of H₂O₂, with 80% hydroxylation observed within a few minutes. The mononuclear complex formed with 1‐methyl‐2‐phenyl‐1H‐benzimidazole (3) shows no hydroxylation under these conditions. It is concluded that the hydroxylation requires the presence of a ligand capable of stabilizing a binuclear species, but no special coordinative activation of the copper is required.
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Other version: http://doi.wiley.com/10.1002/hlca.200690086
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KUEBEL POLLAK, Anita et al. A Minimalist Approach to C-H Activation by Copper. In: Helvetica Chimica Acta, 2006, vol. 89, n° 5, p. 841-853. doi: 10.1002/hlca.200690086 https://archive-ouverte.unige.ch/unige:118541

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