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Synthesis,crystal structure and imine bond activation of a copper(II) Schiff base complex

Mukherjee, Arindam and Nethaji, Munirathinam and Chakravarty, Akhil R (2004) Synthesis,crystal structure and imine bond activation of a copper(II) Schiff base complex. In: Polyhedron, 23 (18). pp. 3081-3085. (Unpublished)

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A new copper(II) complex $[Cu(HL)(ClO_4)](ClO_4)$ (1), where HL is a multidentate Schiff base N,N'-(2-hydroxypropane-1,3- diyl)bis(pyridine-2-aldimine), is prepared, structurally characterized by X-ray crystallography and its spectral and electrochemical properties studied. The complex forms a one-dimensional chain in the solid state structure in which the monomeric $\lbrace Cu(HL)\rbrace$ units are linked by the perchlorate ligand. The complex has an axially elongated six coordinate geometry (4+2) with a $CuN_4O_2$ core in which the Schi. base ligand displays a tetradentate mode of bonding in the basal plane. The axial ligand is perchlorate with a signi .cantly long Cu–O bond of ca. $2.6 \AA$ . The one-electron paramagnetic complex displays a cyclic voltammetric response for the Cu(II)/Cu(I) couple at 0.01 V versus SCE in MeCN–0.1 M TBAP. The azomethine bond of the Schi. base in 1 on treatment with $H_2O_2$ undergoes oxidative conversion to form a bis(picolinato)copper(II) $\cdot$ dihydrate species through the formation of an amido intermediate as evidenced from the solution infrared spectral studies.

Item Type: Journal Article
Publication: Polyhedron
Publisher: Elsevier
Additional Information: The copyright of this article belongs to Elsevier.
Keywords: Copper(II)complex;Schi.base;X-ray structure;Imine activation;Coordination polymer
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 23 Mar 2006
Last Modified: 19 Sep 2010 04:24
URI: http://eprints.iisc.ac.in/id/eprint/5879

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