The X-ray structure is reported for the complex Cu 2 (medpco-2H)Cl 2 , (medpco =N,N -bis(2-N,N-dimethylaminoethyl)pyridine-2,6-dicarboxamide 1-oxide. The complex is triclinic, P1, a = 8.313(4), b = 11.403(5), c = 11.611(3) , α = 91.66(3), β = 108.99(4), γ = 109.60(3)° and Z = 2. The deprotonated ligand (medpco-2H) 2 - acts as a binucleating ligand, producing anN -oxide-bridged complex. Each copper in Cu 2 (medpco-2H)Cl 2 is five-coordinate, being coordinated by a bridging N-oxide oxygen, a deprotonated amide nitrogen, a tertiary amine nitrogen and two bridging chlorides. The complex does not exhibit significant magnetic interaction, and this may be the result of distortion of the bridging geometry from planarity. A range of other, apparentlyN -oxide-bridged, complexes of the type Cu 2 (medpco-2H)X 2 is reported. The complex Cu 2 (medpco-2H)Br 2 H 2 O is strongly antiferromagnetic, with magnetic data closely fitting the expected binuclear structure.