Issue 15, 2012
From the journal:

Dalton Transactions

Copper perchlorate and tetrafluoridoborate compounds with the ligand 1,4,5-triazanaphthalene. Gradual transformation of mononuclear Cu(ii) compounds via polynuclear mixed-valence Cu(ii)/Cu(i) species to dinuclear Cu(i); syntheses, characterizations and X-ray structures†

Gerard A. van Albada,a   Ilpo Mutikainen,b   Mohamed Ghazzali,c   Khalid Al-Farhanc  and  Jan Reedijk*ac  

* Corresponding authors

a Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

b Laboratory of Inorganic Chemistry, Department of Chemistry, P.O. Box 55 (A.I. Virtasen aukio 1), Finland

c Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia

Abstract

When the ligand 1,4,5-triazanaphthalene (abbreviated as tan) is reacted with Cu(II) BF4− and ClO4− salts, a variety of mononuclear compounds has been found, all with the [Cu(tan)4] unit and varying amounts of weakly coordinating axial ligands and lattice solvents. Reproducible compounds formed include two purple compounds, analyzing as [Cu(tan)4](ClO4)2(CH3OH)2(H2O) (1) and [Cu(tan)4](BF4)2(CH3OH)1.5(H2O) (3), and two blue compounds, analyzing as [Cu(tan)4](ClO4)2(H2O)2 (2) and [Cu(tan)4]2(BF4)2(H2O)2 (4). Upon standing at room temperature, red-coloured, mixed-valence dinuclear-based 3D coordination polymers are formed by conversion of the purple/blue products, of which [Cu2(tan)4]n(BF4)3n (5) and the isomorphic methanol–water adduct [Cu(tan)4]n(BF4)3n(CH3OH)n(H2O)5n (5A) are presented in this paper. In addition a fully reduced dinuclear Cu(I) compound of formula [Cu2(tan)3(ClO4)2] (7) has been observed, and structurally characterized, as a rare three-blade propeller structure, with a Cu–Cu distance of 2.504 Å.

Graphical abstract: Copper perchlorate and tetrafluoridoborate compounds with the ligand 1,4,5-triazanaphthalene. Gradual transformation of mononuclear Cu(ii) compounds via polynuclear mixed-valence Cu(ii)/Cu(i) species to dinuclear Cu(i); syntheses, characterizations and X-ray structures

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Article information

DOI
https://doi.org/10.1039/C2DT12085B
Article type
Paper
Submitted
02 Nov 2011
Accepted
31 Jan 2012
First published
23 Feb 2012

Dalton Trans., 2012,41, 4566-4574

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Copper perchlorate and tetrafluoridoborate compounds with the ligand 1,4,5-triazanaphthalene. Gradual transformation of mononuclear Cu(II) compounds via polynuclear mixed-valence Cu(II)/Cu(I) species to dinuclear Cu(I); syntheses, characterizations and X-ray structures

G. A. van Albada, I. Mutikainen, M. Ghazzali, K. Al-Farhan and J. Reedijk, Dalton Trans., 2012, 41, 4566 DOI: 10.1039/C2DT12085B

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