From a 1D Sb Coordination Polymer to a 3D Sb Framework with Pyrazine: Switching off the Stereochemically Active Lone‐Pair

The one‐dimensional coordination polymer 1∞[SbCl3(pyz)] (1) and the three‐dimensional frameworks 3∞[Sb2Cl6(pyz)3] (2) and 3∞[Sb2I6(pyz)3] (3) were obtained from SbX3 (X: Cl, I) and pyrazine (pyz). These coordination polymers are, to the best of our knowledge, among the first Sb‐based coordination po...

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Published in:Zeitschrift für anorganische und allgemeine Chemie (1950) 2020-06, Vol.646 (11-12), p.507-513
Main Authors: Sorg, Jens R., Schäfer, Thomas C., Schneider, Tilman, Müller‐Buschbaum, Klaus
Format: Article
Language:English
Subjects:
Antimony
Coordination polymers
Halides
Heat treatment
Lone‐pair
Melt‐synthesis
Pyrazine
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Summary:The one‐dimensional coordination polymer 1∞[SbCl3(pyz)] (1) and the three‐dimensional frameworks 3∞[Sb2Cl6(pyz)3] (2) and 3∞[Sb2I6(pyz)3] (3) were obtained from SbX3 (X: Cl, I) and pyrazine (pyz). These coordination polymers are, to the best of our knowledge, among the first Sb‐based coordination polymers constructed from antimony halides and N‐donor ligands. While the Sb3+‐cations in 1 are coordinated in a square‐pyramidal coordination sphere indicating a stereochemically active lone‐pair, no stereochemically active Sb‐lone‐pair is present in 2 and 3 having octahedral coordination spheres around SbIII. Since 2 can be obtained by heating of 1, the character of the Sb‐lone‐pair in 1 can be changed by thermal treatment. Thereby the interlinkage is increased via an additional pyrazine molecule resulting in the octahedral coordination in 2.
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.202000142