Di-mu-methoxo-bis({N,N '-bis[2-(3,5-dimethylpyrazol-1-yl)ethyl]amine-kappaN-3}copper(II)) bis(hexafluorophosphate)

The title compound, [Cu-2 (C14H23N5)(2)(CH3O)(2)](PF6)(2), has a doubly met hoxo-bridged centrosymmetric copper dimer cation involving two tridentate b is(pyrazolyl)amine ligands. The geometry of each Cu II atom is a distorted square pyramid with two N atoms of the pyrazole in bis[2-(3,5-dimethyl-1-py razolyl)ethyl]amine (bpea) and two mu (2)-bridging O atoms of the methoxo l igands forming the basal plane, and the amine N atom occupying the axial po sition. In the bridging plane, the Cu-O bond lengths are 1.940 (4) and 1.94 2 (4) Angstrom, and the bond angles for O-Cu-O and Cu-O-Cu are 76.1 (2) and 103.9 (2)degrees, respectively. The Cu . . . Cu distance is 3.058 (1) Angs trom. The central four-membered ring lies on an inversion centre.