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Issue 38, 2009
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A novel copper(II) complex of a tripodal ligand with phenolate-phenol interligand, intramolecular hydrogen bonding

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Abstract

A novel tripodal ligand with three different arms, viz., pyridine, phenol and an oxime and its copper(II) complex were synthesised. The X-ray crystal structure of the compound reveals that it is a dinuclear complex consisting of two copper(II) ions doubly bridged by two oximato groups in a trans arrangement. The complex contains unusual cis-axially coordinated phenolates as well as a novel interligand, intramolecular phenolate-phenol hydrogen bond. Variable-temperature magnetic susceptibility measurements revealed that the two copper(II) centers are strongly antiferromagnetically coupled, with the exchange coupling constant −2J = 800(42) cm−1 (H = −2J Ŝ1·Ŝ2) for the two interacting S = 1/2 centres. The complex yields an 1H NMR spectrum in CD3CN solution at room temperature, with relatively sharp signals and rather small hyperfine shifts, evidencing that the antiferromagnetically coupled dinuclear core is maintained in solution.

Graphical abstract: A novel copper(II) complex of a tripodal ligand with phenolate-phenol interligand, intramolecular hydrogen bonding

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Submitted
22 May 2009
Accepted
01 Jul 2009
First published
06 Aug 2009

Dalton Trans., 2009, 8111-8116
Article type
Paper

A novel copper(II) complex of a tripodal ligand with phenolate-phenol interligand, intramolecular hydrogen bonding

V. Mathrubootham, A. W. Addison, K. T. Holman, E. Sinn and L. K. Thompson, Dalton Trans., 2009, 8111
DOI: 10.1039/B910188H

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