(A) X-ray structure of [(bpy)Cu(OH)]2(OTf)2, which crystallizes as a dimer of dimers (see Supporting Information for details). The triflate counterions are omitted for clarity. (B) The oxidation of CyCH2OH by CuIOTf () and [(bpy)Cu(OH)]2(OTf)2. (). Data were obtained by monitoring pressure changes during catalytic turnover. Reaction conditions: 10 mM (bpy)Cu, 10 mM TEMPO, 20 mM NMI: 0.2 M CyCH2 OH, 1 atm O2, 2.5 mL MeCN, 27 °C.