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- Title
Cuprous complexes and dioxygen, VII. Competition between one- and two-electron reduction of O<sub>2</sub> in the autoxidation of Cu(1-methyl-2-hydroxymethyl-imidazole)<sub>2</sub><sup>+</sup>.
- Authors
Zuberbühler, Andreas D.
- Abstract
The complexation of 1-methyl-2-hydroxymethyl-imidazole (L) with Cu(I) and Cu(II) has been studied in aqueous acetonitrile (AN). Cu(I) forms three complexes, Cu(AN)L+, CuL2+, and Cu(AN)H−1L, with stability constants log K(Cu(AN)+ + L ⇌ Cu(AN)L+) = 4.60 ± 0.02, logβ2 = 11.31 ± 0.04, and log K(Cu(AN)H−1L+H+ ⇌ Cu(AN)L+) = 10.43 ± 0.08 in 0.15 M AN. The main species for Cu(II) are CuL2+, CuH−1L+, CuH−1L2+, and CuH−2L2. The autoxidation of CuL2+ was followed with an oxygen sensor and spectrophotometrically. Competition between the formation of superoxide in a one-electron reduction of O2 and a path leading to H2O2 via binuclear (CuL2)2O
- Publication
Helvetica Chimica Acta, 1976, Vol 59, Issue 5, p1448
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19760590506