The title compund, [Cu(2)(OH)(2)(C(22)H(25)N(3))(2)](ClO(4))(2), is a copper(II) dimer, with two [CuL](2+) units [L is bis(6-methyl-2-pyridylmethyl)(2-phenylethyl)amine] bridged by hydroxide groups to define the [CuL](mu-OH)(2)[CuL]}(2+) cation. Charge balance is provided by perchlorate counter-anions. The cation has a crystallographic inversion centre halfway between the Cu(II) ions, which are separated
intermediate was also altered by the supporting ligand. Namely, oxygenation of copper(I) complex 2R at a low temperature gave a (μ-η2:η2-peroxo)dicopper(II) complex as in the case of 1Phe, but its O–O bond was relatively weakened as compared to the peroxo complex derived from 1Phe, and a small amount of a bis(μ-oxo)dicopper(III) complex co-existed. These results can be attributed to the higher electron-donor