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Copper(II) Halide Salts with 1-(4′-Pyridyl)-Pyridinediium

Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA
Department of Physics, Clark University, 950 Main St., Worcester, MA 01610, USA
Department of Chemistry, University of Pretoria, Private Bag X20, Hatfield 0028, South Africa
Authors to whom correspondence should be addressed.
Received: 10 December 2019 / Revised: 13 February 2020 / Accepted: 24 February 2020 / Published: 4 March 2020
The compounds [1,4′-bipyridine]-1,1′-diium [CuCl4] (1) and [1,4′-bipyridine]-1,1′-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′-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–Weiss law and yielded Weiss constants of −0.26(5) K (1) and −1.0(1) K (2). View Full-Text
Keywords: Cu(II); magnetism; EPR; pyridine-based compound Cu(II); magnetism; EPR; pyridine-based compound
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MDPI and ACS Style

Monroe, J.C.; Landee, C.P.; Rademeyer, M.; Turnbull, M.M. Copper(II) Halide Salts with 1-(4′-Pyridyl)-Pyridinediium. Inorganics 2020, 8, 18.

AMA Style

Monroe JC, Landee CP, Rademeyer M, Turnbull MM. Copper(II) Halide Salts with 1-(4′-Pyridyl)-Pyridinediium. Inorganics. 2020; 8(3):18.

Chicago/Turabian Style

Monroe, Jeffrey C.; Landee, Christopher P.; Rademeyer, Melanie; Turnbull, Mark M. 2020. "Copper(II) Halide Salts with 1-(4′-Pyridyl)-Pyridinediium" Inorganics 8, no. 3: 18.

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