Abstract
Abstract Supramolecular [Cu(II)(ONQ)2(H2O)2]n (1) a complex of the 2-hydroxy-1,4-naphthoquinone ligand (2HNQ), has been synthesized using CuCl2 · 2H2O. ONQ is the deprotonated oxidized form of the ligand (viz. 2-oxido-1,4-naphthoquinone). The complex has been characterised by X-ray crystallography, variable temperature magnetic susceptibility measurements (SQUID), EPR and CV studies. The crystal structure of 1 has been solved at 295 and 161 K. The cell volume decreases from 435.3(6) A3 at 295 K to 427.9(6) A3 at 161 K. The monomeric units of 1 are linked by three types of intermolecular hydrogen bondings through coordinated ONQ ligands and water molecules, which results in a supramolecular three dimensional hydrogen bonding network. The magnetic susceptibility data of 1 were best fitted with the Bonner Fisher equation with the coupling parameter J = −3.2 cm−1, indicating a weak antiferromagnetic interaction along the chain.
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