Mononuclear and polynuclear halide and nitrate Cu(II) compounds with 1,4,5-triazanaphthalene as a ligand: Characterization, magnetism and X-ray structures

Albada, Gerard A. van; Horst, Maarten G. van der; Fu, W.T.; Roubeau, Olivier; Mutikainen, Ilpo; Turpeinen, Urho; Reedijk, Jan

doi:10.1016/j.ica.2009.05.055

Cited by 3 publications

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“…This observations can also be compared with our earlier observations of a number of tan compounds [6]. Detailed assignment is outside the scope of this study; so these bands are given in the supplementary material for characterization purpose only.…”

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confidence: 63%

“…A few coordination compounds with tan and several transition metals atoms were already prepared some decades ago [1,2], but X-ray structures have been reported so far only in a limited number of cases, i.e. Os and Ru [3,4], and a Cu chain [5], till the recent paper by some of us appeared about a variety of new Cu(II) compounds [6].Under aerobic conditions mononuclear or polynuclear Cu(II) compounds are formed depending on the conditions and especially the used anion. In the case of coordinating anions, like Cl and Br, interesting ligand and halide-bridged polymeric compounds are formed.…”

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confidence: 99%

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confidence: 99%

“…In the case of coordinating anions, like Cl and Br, interesting ligand and halide-bridged polymeric compounds are formed. These polynuclear compounds either use N1 and N4 of the ligand, or N1 and N5 of the ligand [6].…”

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A unique, rigid porous coordination polymer with 1,4,5-triazanaphthalene and mixed-valence Cu as the bridging metal

Albada

Ghazzali

Al-Farhan

et al. 2011

Inorganic Chemistry Communications

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confidence: 63%

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confidence: 99%

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A unique, rigid porous coordination polymer with 1,4,5-triazanaphthalene and mixed-valence Cu as the bridging metal

Albada

Ghazzali

Al-Farhan

et al. 2011

Inorganic Chemistry Communications

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“…Mononuclear and polynuclear compounds, depending on the synthetic method, were obtained for each combination. 11 The polynuclear compounds either use N1 and N4, or N1 and N5 of the ligand. 11 To obtain more insight we extend our research with this ligand to the combinations of Cu(II) and weakly coordinating anions, like ClO 4 − , BF 4…”

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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

Albada

Mutikainen²,

Ghazzali

et al. 2012

Dalton Trans.

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When the ligand 1,4,5-triazanaphthalene (abbreviated as tan) is reacted with Cu(II) BF(4)(-) and ClO(4)(-) 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)](ClO(4))(2)(CH(3)OH)(2)(H(2)O) (1) and [Cu(tan)(4)](BF(4))(2)(CH(3)OH)(1.5)(H(2)O) (3), and two blue compounds, analyzing as [Cu(tan)(4)](ClO(4))(2)(H(2)O)(2) (2) and [Cu(tan)(4)](2)(BF(4))(2)(H(2)O)(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 [Cu(2)(tan)(4)](n)(BF(4))(3n) (5) and the isomorphic methanol-water adduct [Cu(tan)(4)](n)(BF(4))(3n)(CH(3)OH)(n)(H(2)O)(5n) (5A) are presented in this paper. In addition a fully reduced dinuclear Cu(I) compound of formula [Cu(2)(tan)(3)(ClO(4))(2)] (7) has been observed, and structurally characterized, as a rare three-blade propeller structure, with a Cu-Cu distance of 2.504 Å.

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Synthesis, crystal structures and magnetic properties of dinuclear copper(ii) compounds with NNO tridentate Schiff base ligands and bridging aliphatic diamine and aromatic diimine linkers

et al. 2011

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The synthesis and the characterization of new dinuclear copper(II) compounds of general formula [(L(a-d))(2)Cu(2)(μ-N-N)](ClO(4))(2) (1-6) with either neutral aliphatic diamine (N-N = piperazine, pip) or aromatic diimine (N-N = 4,4'-bipyridine, 4,4'-bipy) linker are reported. The copper ligands L(-) (L(a-) = (E)-2-((2-aminoethylimino)methyl)phenolate, L(b-) = (E)-2-((2-aminopropylimino)methyl)-phenolate, L(c-) = (E)-2-((2-aminoethylimino)methyl)4-nitrophenolate, L(d-) = (E)-2-((2-aminoethylimino)methyl)4-methoxyphenolate) are NNO tridentate Schiff bases derived from the monocondensation of a substituted salicylaldehyde 5-G-salH (G = NO(2), H, OMe) with ethylenediamine, en, or 1,3-propylenediamine, tn. The crystal structures of compounds [(L(a))(2)Cu(2)(MeOH)(2)(μ-4,4'-bipy)](ClO(4))(2) (1·2MeOH), [(L(b))(2)Cu(2)(MeOH)(2)(μ-4,4'-bipy)](ClO(4))(2) (2·2MeOH), [(L(d))(2)Cu(2)(μ-4,4'-bipy)](ClO(4))(2) (4), [(L(a))(2)Cu(2)(μ-pip)](ClO(4))(2) (5) and [(L(b))(2)Cu(2)(μ-pip)](ClO(4))(2) (6) have been determined, revealing the preferred (e-e)-chair conformation of the bridging piperazine in compounds 5 and 6. The presence of hydrogen-bond-mediated intermolecular interactions, that involve the methanol molecules, yields dimers of dinuclear units for 1·2MeOH, and infinite zig-zag chains for 2·2MeOH. The temperature dependences of the magnetic susceptibilities χ(M)(T) for all compounds were measured, indicating the presence of antiferromagnetic Cu-Cu exchange. For the compounds 2-4 with 4,4'-bipy, the coupling constants J are around -1 cm(-1), while in compound 1 no interaction could be detected. The compounds 5 and 6 with piperazine display higher Cu-Cu magnetic interactions through the σ-bonding backbone of the bridging molecule, with J around -8 cm(-1), and the coupling is favoured by the (e-e)-chair conformation of the diamine ring. The non-aromatic, but shorter, linker piperazine gives rise to stronger Cu-Cu antiferromagnetic couplings than the aromatic, but longer, 4,4'-bipyridine. In the latter case, the rotation along the C-C bond between the two pyridyl rings and the consequent non co-planarity of the two copper coordination planes play an important role in determining the magnetic communication. EPR studies reveal that the dinuclear species are not stable in solution, yielding the solvated [(L)Cu(MeOH)](+) and the mononuclear [(L)Cu(N-N)](+) species; it appears that the limited solubility of the dinuclear compounds is responsible for their isolation in the solid state.

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Mononuclear and polynuclear halide and nitrate Cu(II) compounds with 1,4,5-triazanaphthalene as a ligand: Characterization, magnetism and X-ray structures

Cited by 3 publications

References 25 publications

A unique, rigid porous coordination polymer with 1,4,5-triazanaphthalene and mixed-valence Cu as the bridging metal

A unique, rigid porous coordination polymer with 1,4,5-triazanaphthalene and mixed-valence Cu as the bridging metal

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

Synthesis, crystal structures and magnetic properties of dinuclear copper(ii) compounds with NNO tridentate Schiff base ligands and bridging aliphatic diamine and aromatic diimine linkers

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