A.: Automating Experimentation on

R factor = 0.054; wR factor = 0.159; data-to-parameter ratio = 12.0. In the title compound, [Cu(C10H8N3O2)2]4H2O, the CuII ion has a distorted octahedral coordination formed by four O [Cu—O = 2.051 (3)–2.083 (4) Å] and two N [Cu—N = 1.985 (4) and 1.996 (4) Å] atoms from two tridentate bis(1-oxo-2-pyridyl)aminate ligands. In the two ligands, the pyridyl rings form dihedral angles of 21.0 (1) and 15.5 (1). The crystal packing exhibits an extensive network of O—H O hydrogen bonds and – interactions proved by short distances of 3.650 (1) and 3.732 (2) A ̊ between the centroids of pyridyl rings of neighbouring molecules. Related literature For general background, see Patra et al. (2004). For the crystal structures of related compounds, see: Kuang et al. (2006); Liu et al. (2007, 2008)