Copper(II) Halide Salts with 1-(4′-Pyridyl)-Pyridinediium
| Autor: | Jeffrey C. Monroe, C. P. Landee, Mark M. Turnbull, Melanie Rademeyer |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
pyridine-based compound 010405 organic chemistry Hydrogen bond Magnetism Crystal structure Cu(II) 010402 general chemistry 01 natural sciences Magnetic susceptibility lcsh:QD146-197 0104 chemical sciences law.invention Inorganic Chemistry Crystal Crystallography law magnetism lcsh:Inorganic chemistry Antiferromagnetism EPR Electron paramagnetic resonance Monoclinic crystal system |
| Zdroj: | Inorganics Volume 8 Issue 3 Inorganics, Vol 8, Iss 3, p 18 (2020) |
| ISSN: | 2304-6740 |
| DOI: | 10.3390/inorganics8030018 |
| Popis: | The compounds [1,4&prime bipyridine]-1,1&prime diium [CuCl4] (1) and [1,4&prime diium [CuBr4] (2) were prepared and their crystal structures and magnetic properties are reported. The compounds are isomorphous and crystallize in the monoclinic space group C2/c. The cation crystallizes in a two-fold disordered fashion with the terminal nitrogen and carbon atoms exhibiting 50% occupancies. This results in a crystal packing arrangement with significant hydrogen bonding that is very similar to that observed in the corresponding 4,4&prime bipyridinediium complexes. Temperature dependent magnetic susceptibility measurements and room temperature EPR spectroscopy indicate the presence of very weak antiferromagnetic exchange. The data were fit to the Curie&ndash Weiss law and yielded Weiss constants of &minus 0.26(5) K (1) and &minus 1.0(1) K (2). |
| Databáze: | OpenAIRE |
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