Synthesis, Crystal Structure and Thermal Properties of Silver(I) Bromide Ethylenediamine Coordination Polymers

Näther, Christian; Beck, Andreas

doi:10.1515/znb-2004-0908

Cited by 12 publications

(6 citation statements)

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“…We have found that most of the ligand-rich compounds decompose into the ligand-deficient compounds on heating, whereas a few compounds transform directly to the pure copper(I) halides or pseudohalides. − A similar reactivity has also been observed for coordination compounds based on silver(I) or zinc(II) halides, and we have also shown that coordination polymers that exhibit cooperative magnetic interactions can be prepared by this route. − In almost all cases, ligand-deficient intermediates are formed in 100% yield and in a very pure form. Therefore, the controlled thermal decomposition of suitable precursor compounds is a convenient alternative for the discovery or synthesis of coordination polymers and inorganic−organic hybrid compounds, which cannot be prepared in solution or which are always obtained as mixtures.…”

Section: Introductionsupporting

confidence: 64%

Investigations on the Synthesis, Structures, and Properties of New Copper(I) 2,3-Dimethylpyrazine Coordination Compounds

Jeß

Näther

2006

Inorg. Chem.

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Five new coordination compounds were prepared, structurally characterized, and investigated for their thermal properties. In the structure of the ligand-rich 4:9 compound, tetra(mu2-chloro)bis(mu2-2,3-dimethylpyrazine-N,N')tetrakis(2,3-dimethylpyrazine-N)tetracopper(I) tris(2,3-dimethylpyrazine)solvate (I), discrete complexes are formed by build up of two [(CuCl-(2,3-dimethylpyrazine)2]2 dimers, which are connected by two 2,3-dimethylpyrazine ligands via mu-N,N' coordination. In the 1:1 compound poly[mu2-chloro-mu2-2,3-dimethylpyrazine-N,N'-copper(I)] (II), (CuCl)2 dimers are found, which are connected by the 2,3-dimethylpyrazine ligands into layers. For this composition, a second polymorphic modification was found (III), which exhibits a different topology of the coordination network and a different packing of the layers. In the most stable 3:2 compound catena[tri(mu2-chloro)bis(mu2-2,3-dimethylpyrazine-N,N')tricopper(I)] (IV), six-membered rings of (CuCl)3 are found, which are connected by the 2,3-dimethylpyrazine ligands into chains. In the ligand-deficient 2:1 compound, poly[di(mu3-chloro)(mu2-2,3-dimethylpyrazine-N,N')dicopper(I)] (V), CuCl double chains are found, which are connected by the 2,3-dimethylpyrazine ligands into layers. On heating, compound I transforms quantitatively into the 3:2 compound IV without the formation of II or III as intermediates. Compound IV is also obtained by heating either the 1:1 compound II or III. On further heating, the 3:2 compound IV loses additional ligands, forming the ligand-deficient 2:1 compound V, which then decomposes into CuCl. The stability, thermal reactivity, and the transition behavior of all compounds were investigated using different thermoanalytical methods. These results are compared with those previously reported for the structurally similar CuCl(2-ethylpyrazine) coordination compounds. The formation and the stability of the different compounds in solution were also investigated.

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Section: Introductionsupporting

confidence: 64%

Investigations on the Synthesis, Structures, and Properties of New Copper(I) 2,3-Dimethylpyrazine Coordination Compounds

Jeß

Näther

2006

Inorg. Chem.

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“…Although predominantly occurring as a chelating agent, ethylenediamine (for simplicity, further denoted as en ) has been observed to possess the capacity to act as a bridging ligand as well. Various coordination polymers have been reported so far with en linking neighboring metal centers such as: Co(II) (Lauchan et al , 2008), Zn(II) (Pritchard et al , 2001), or Ag(I) (Näther and Beck, 2004).…”

Section: Introductionmentioning

confidence: 99%

Ethylenediamine as a bridging ligand: structure solution of two cadmium(II)-based coordination polymers from powder diffraction data

2013

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Structures of [Cd(C2H8N2)Cl2]n(1) and [Cd(C2H8N2)Br2]n(2) were solved from powder diffraction data. Compound (1) crystallizes in the space group Pbam (No. 55), a = 9.9021(7) Å, b = 7.8186(6) Å, c = 4.0705(3) Å, V = 315.13(3) Å3, Z = 2. (2) is isostructural: space group Pbam (No. 55), a = 10.405(2) Å, b = 7.8634(8) Å, c = 4.2079(5) Å, V = 344.28(6) Å3, Z = 2. The investigated compounds are examples of two-dimensional hybrid coordination polymers, in which neighboring metal centers are bridged via both organic and inorganic moieties: ethylenediamine molecules and halide anions. Both crystal structures were solved ab initio from powder data using direct methods.

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“…uni-kiel.de compounds with AgX and ZnX 2 (X = Cl, Br, I) can be prepared and that this method is also useful for the preparation of coordination polymers that exhibit cooperative magnetic properties. [28][29][30] During these investigations we have prepared different CuX(2,3dmpyz) (X = Cl, 15 Br 16,17 ) coordination polymers. With CuCl four different compounds were identified and structurally characterized, with one of them crystallizing in two different polymorphic modifications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, crystal structure, thermal and luminescence properties of CuX(2,3-dimethylpyrazine) (X = Cl, Br, I) coordination polymers

et al. 2007

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Three new coordination polymers based on CuI and 2,3-dimethylpyrazine (2,3-dmpyz) were prepared, structurally characterized and investigated for their thermal and luminescence properties. In the ligand rich 2:3 compound [(CuI)2(2,3-dmpyz)3] (CuI)2 dimers are found, which are connected by the N-donor ligands into chains, whereas in the structure of the 1:1 intermediate [(CuI)(2,3-dmpyz)] (CuI)4 tetramers are found, which are also connected into chains. The crystal structure of the ligand deficient 2:1 compound [(CuI)2(2,3-dmpyz)] is built up of CuI double chains, which are connected by the 2,3-dmpyz ligands into layers. Thermal decomposition of results in its direct transformation into the ligand deficient compound , without the formation of the 1:1 compound as an intermediate. A similar thermal reactivity is found for compound , which transforms into on heating. Stirring of a crystalline suspension of pure or in acetonitrile, always leads to a transformation into the ligand deficient compound indicating that compound is the most stable of all the coordination polymers, whereas compounds and are metastable. The luminescence properties of the CuCl and CuI coordination polymers were investigated at 298 and 77K. It was observed that the emission maxima strongly depends on the nature of the halide atom and the composition and structure of the coordination polymers. In addition, several of these compounds show luminescence thermochromism. These results are compared with those obtained for the previously reported CuCl and CuBr(2,3-dimethylpyrazine) coordination polymers.

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Synthesis, Crystal Structure and Thermal Properties of Silver(I) Bromide Ethylenediamine Coordination Polymers

Cited by 12 publications

References 0 publications

Investigations on the Synthesis, Structures, and Properties of New Copper(I) 2,3-Dimethylpyrazine Coordination Compounds

Investigations on the Synthesis, Structures, and Properties of New Copper(I) 2,3-Dimethylpyrazine Coordination Compounds

Ethylenediamine as a bridging ligand: structure solution of two cadmium(II)-based coordination polymers from powder diffraction data

Synthesis, crystal structure, thermal and luminescence properties of CuX(2,3-dimethylpyrazine) (X = Cl, Br, I) coordination polymers

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