Electrochemical properties of some alkoxo-bridged binuclear copper(II) complexes with sulfur-containing ligands.
Electrochemical properties of alkoxo-bridged binuclear copper(II) complexes with sulfur-containing tridentate ligands, Cu{RS(CH2)2NH(CH2)3O}ClO4 and Cu{R2N(CH2)2S(CH2) 2O}X (R=alkyl; X=Cl, Br), were investigated. The former showed a two-electron reduction, Cu(II)–Cu(II)→Cu(I)–Cu(I), near −0.2 V (vs. SCE), while the latter showed two one-electron reductions at ∼0.2 and −0.3∼−0.6 V (vs. SCE): Cu(II)–Cu(II)→Cu(II)–Cu(I)→Cu(I)–Cu(I).