Bis(N-nitroso-N-pentyl-hydroxy-laminato-κ(2) O,O')copper(II).

In the centrosymmetric title compound, [Cu(C5H11N2O2)2], the Cu(2+) ion, located on an inversion centre (Wyckoff position 2b), is in a square-planar environment, surounded by four O atoms of the N-O groups of two N-nitroso-N-pentyl-hydroxy-laminate ligands [Cu-O = 1.9042†(17) and 1.9095†(16)†à ]. The hy-droxy-laminate monoanions are bidentate chelating ligands. The Cu(2+) cations form stacks along [010], with inter-molecular Cu⋯N contacts of 3.146†(2) and 3.653†(2)†à .