Crystal structure of tetra­kis­(μ(3)-2-{[1,1-bis­(hy­droxy­meth­yl)-2-oxidoeth­yl]imino­meth­yl}phenolato)tetra­copper(II) ethanol monosolvate 2.5-hydrate

The title compound, [Cu(4)(C(11)H(13)NO(4))(4)]·CH(3)CH(2)OH·2.5H(2)O, is an electronically neutral tetra­nuclear copper(II) complex with a cubane-like Cu(4)O(4) 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 Cu(II) atoms in the Cu(4)O(4) core are connected by four μ(3)-O atoms from the deprotonated alcohol hy­droxy groups. Each of the penta­coordinated Cu(II) ions has an NO(4) 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.