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Issue 19, 2000
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Novel copper(II) complexes of “short” salen homologues. Structure and magnetic properties of the tetranuclear complex [Cu2(L2)2]2 [H2L2 = phenyl-N,N ′-bis(salicylidene)methanediamine]

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Abstract

Copper(II) complexes of Schiff bases derived from the condensation of two molecules of salicylaldehyde and methanediamine (L1) or some phenyl substituted methanediamines (L2–L5) have been synthesized and characterised. The crystal structure of the phenylmethanediamine (L2) derivative has been determined. The ligand acts as bis-bidentate, bridging two copper atoms which are co-ordinated to two phenolato and two imino groups of two ligands. Two binuclear moieties [Cu2(L2)2] are held together through Cu–O(phenolato) interactions between adjacent units forming a pseudo-linear [Cu2L22]2 cluster. Variable temperature magnetic susceptibility data for this derivative reveal the presence of weak antiferromagnetic interactions (−J ≈ 2–3 cm−1) between nearest neighbour spin centres. The structural factors that may be responsible for the sign and magnitude of the exchange interactions are discussed.

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Publication details

The article was received on 15 May 2000, accepted on 11 Jul 2000 and first published on 13 Sep 2000


Article type: Paper
DOI: 10.1039/B003825N
Citation: J. Chem. Soc., Dalton Trans., 2000,0, 3467-3472
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    Novel copper(II) complexes of “short” salen homologues. Structure and magnetic properties of the tetranuclear complex [Cu2(L2)2]2 [H2L2 = phenyl-N,N ′-bis(salicylidene)methanediamine]

    A. Pasini, F. Demartin, O. Piovesana, B. Chiari, A. Cinti and O. Crispu, J. Chem. Soc., Dalton Trans., 2000, 0, 3467
    DOI: 10.1039/B003825N

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