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Abstract
The reaction between CuSO 4·5H 2O and [NMe 2H 2]Cl in N,N-dimethylformamide (DMF) at 95 °C yielded green crystals of (NMe 2H 2) 4[Cu 6O 2(SO 4) 6(DMF) 4] 1. The discrete [Cu 6(μ 4-O) 2(μ 3- SO 4) 4(μ 2-SO 4) 2(DMF) 4] 4- anions present in 1 contain two edge-sharing Cu 4(μ 4-O) tetrahedra, with the copper(II) centers bridged by sulfato ligands. These anions are linked into a two-dimensional network through hydrogen bonds involving the dimethylammonium cations. When the reaction was carried out in the absence of [NMe 2H 2]Cl, yellow-green crystals of (NMe 2H 2) 4[Cu 6O 2(SO 4) 6(DMF) 2] 2 were obtained. The anions in 2 contain similar Cu 6O 2(SO 4) 6 aggregates to those in 1, though these differ in terms of the copper(II) coordination geometries. In addition, the anions in 2 are linked into chains through bridging sulfato ligands. The Cu 6O 2(SO 4) 6 aggregates observed in 1 and 2 are related to those present in the rare copper sulfate mineral fedotovite, K 2Cu 3O(SO 4) 3, and in common with this mineral both 1 and 2 decompose in the presence of moisture. The reaction between CuSO 4·5H 2O and [NMe 2H 2]Cl in DMF at room temperature gave (NMe 2H 2)[Cu 2(OH)(SO 4) 2(H 2O) 2] 3, the structure of which contains triangular Cu 3(OH)(SO 4) units that share vertices to form tapes. Magnetic measurements revealed that 1 and 3 are both spin-canting metamagnetic systems. Field-induced responses were observed below 5 K, with the critical field indicating metamagnetic behavior from antiferromagnetic to ferromagnetic equal to 110 Oe for both compounds.
Original language | English |
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Pages (from-to) | 10983-10989 |
Number of pages | 7 |
Journal | Inorganic Chemistry |
Volume | 51 |
Issue number | 20 |
Early online date | 16 Sept 2012 |
DOIs | |
Publication status | Published - 15 Oct 2012 |
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Dive into the research topics of 'Synthesis, structures, and magnetic behavior of new anionic copper(II) sulfate aggregates and chains'. Together they form a unique fingerprint.Projects
- 2 Finished
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Nano-Integration of Metal-Organic Frameworks and Catalysis for the Uptake and Utilisation of CO2
Marken, F. (PI), Burrows, A. (CoI), Cameron, P. (CoI), Edler, K. (CoI), Hammond, G. (CoI), Jones, M. (CoI), Mattia, D. (CoI), McManus, M. (CoI), Pascu, S. (CoI), Plucinski, P. (CoI) & Raithby, P. (CoI)
Engineering and Physical Sciences Research Council
1/05/10 → 14/02/14
Project: Research council
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CATALYTIC APPLICATIONS OF METAL-ORGANIC FRAMEWORKS
Burrows, A. (PI)
Engineering and Physical Sciences Research Council
11/02/08 → 30/09/11
Project: Research council