Three dimensional hydrogen-bonding network in a copper complex of 2-hydroxy-1, 4-naphthoquinone: structural, spectroscopic and magnetic properties
S Salunke-Gawali, SY Rane, VG Puranik… - Polyhedron, 2004 - Elsevier
S Salunke-Gawali, SY Rane, VG Puranik, C Guyard-Duhayon, F Varret
Polyhedron, 2004•ElsevierSupramolecular [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) Å3 at 295 K to …
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) Å3 at 295 K to …
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) Å3 at 295 K to 427.9(6) Å3 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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