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Issue 33, 2017
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New Au(I)–Cu(I) heterometallic complexes: the role of bridging pyridazine ligands in the presence of unsupported metallophilic interactions

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Abstract

The reaction of the polymers [Au2Cu2(C6X5)4(NCMe)2]n (X = Cl (1), F (2)) with the aromatic N-donor ligand pyridazine in different molar ratios gives rise to new Au(I)/Cu(I) heterometallic complexes [AuCu(C6Cl5)22-C4H4N2)(NCMe)]2 (3), [AuCu(C6X5)22-C4H4N2)(C4H4N2)]2 (X = Cl (4), X = F (6)) and [Cu22-C4H4N2)3(NCMe)2][Au(C6F5)2]2 (5). In all cases, the close proximity of the donor atoms in the diazine ligand leads to discrete molecules where two copper centres are connected by two or three bridging pyridazine ligands. In this way, focusing on the number of bridging ligands present in the molecules, unsupported closed-shell Au(I)⋯Cu(I) (with two bridging pyrazine ligands) or weak Cu(I)⋯Cu(I) interactions (with three bridging pyridazines) have been observed. None of these pyridazine derivatives is luminescent, which is probably related to the absence of aurophilic contacts.

Graphical abstract: New Au(i)–Cu(i) heterometallic complexes: the role of bridging pyridazine ligands in the presence of unsupported metallophilic interactions

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Publication details

The article was received on 19 Jun 2017, accepted on 22 Jul 2017 and first published on 02 Aug 2017


Article type: Paper
DOI: 10.1039/C7DT02229H
Citation: Dalton Trans., 2017,46, 10941-10949
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    New Au(I)–Cu(I) heterometallic complexes: the role of bridging pyridazine ligands in the presence of unsupported metallophilic interactions

    R. Donamaría, E. J. Fernández, J. M. López-de-Luzuriaga, M. Monge, M. E. Olmos, D. Pascual and M. Rodríguez-Castillo, Dalton Trans., 2017, 46, 10941
    DOI: 10.1039/C7DT02229H

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