Chlorido-(2-{(2-hy-droxy-eth-yl)[tris-(hy-droxy-meth-yl)meth-yl]amino}-ethano-lato-κ5 N,O,O',O'',O''')copper(II).

The title complex, [Cu(C8H18NO5)Cl] or [Cu(H4bis-tris-)Cl], was obtained starting from the previously reported [Cu(H5bis-tris-)Cl]Cl compound. The deprotonation of the amino-polyol ligand H5bis-tris {[bis-(2-hy-droxy-eth-yl)amino]-tris-(hy-droxy-meth-yl)methane, C8H19NO5} promotes the formation of a very strong O-H⋯O inter-molecular hydrogen bond, characterized by an H⋯O separation of 1.553 (19) Å and an O-H⋯O angle of 178 (4)°. The remaining hy-droxy groups are also engaged in hydrogen bonds, forming R 2 2(8), R 4 4(16), R 4 4(20) and R 4 4(22) ring motifs, which stabilize the triperiodic supra-molecular network.