Bis(triethanolamine-κ³<i>N,O,O</i>′)copper(II) squarate

In the crystal structure of the title compound, [Cu(C6H15NO3)2](C4O4), the cations and anions are located on inversion centres and a supramolecular architecture is formed. Two triethano­lamine (TEA) ligands coordinate to the CuII ion through four O atoms and two N atoms acting as N,O,O′-tridentate ligands, resulting in a distorted octahedral environment, with Cu—O bond distances of 2.0199 (17) and 2.288 (2) Å and a Cu—N distance of 2.0340 (18) Å. The squarate (C4O42−) anions and [Cu(TEA)2]2+ cations are linked to each other by hydrogen bonding between coord­inated hydroxyl H atoms of TEA and squarate O atoms, forming layers. Adjacent layers are interlinked by hydrogen bonding between free hydroxyl H atoms of TEA and one of the squarate O atoms.

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