| Summary: | The title compound, [Cu4(C11H13NO4)4]·CH3CH2OH·2.5H2O, is an electronically neutral tetranuclear copper(II) complex with a cubane-like Cu4O4 core. The complete molecule has point group symmetry 2. The phenol hydroxy group and one of the three alcohol hydroxy groups of each 2-{[tris(hydroxymethyl)methyl]iminomethyl}phenol ligand are deprotonated, while the secondary amine and the other two hydroxy groups remain unchanged. The CuII atoms in the Cu4O4 core are connected by four μ3-O atoms from the deprotonated alcohol hydroxy groups. Each of the pentacoordinated CuII ions has an NO4 distorted square-pyramidal environment through coordination to the tridentate Schiff base ligands. The Cu—N/O bond lengths span the range 1.902 (4)–1.955 (4) Å, similar to values reported for related structures. There are O—H...O hydrogen-bond interactions between the complex molecules and the ethanol and water solvent molecules, leading to the formation of a three-dimensional network. The ethanol solvent molecule is disordered about a twofold rotation axis. One of the two independent water molecules is also located on this twofold rotation axis and shows half-occupancy.
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