Bis­(Triethano­lamine-κN,O,O′)Copper(II) Squarate

Abstract

In the crystal structure of the title compound, [Cu(C<inf>6</inf>H <inf>15</inf>-NO<inf>3</inf>)<inf>2</inf>](C<inf>4</inf>O<inf>4</inf>), 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) A. The squarate (C<inf>4</inf>O <inf>4</inf>2-) anions and [Cu(TEA)<inf>2</inf>]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. © 2004 International Union of Crystallography Printed in Great Britain - all rights reserved.