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Int. J. Mol. Sci. 2016, 17(4), 596; doi:10.3390/ijms17040596

Tetrabromidocuprates(II)—Synthesis, Structure and EPR

1
Institute of Chemistry, University of Potsdam, Karl-Liebknechtstr.-Str. 24-25, Potsdam D-14476, Germany
2
Engineering Education Research Group, Hamburg University of Technology (TUHH), Am Schwarzberg-Campus 3 (E), Hamburg D-21073, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Peter Hesemann and Andreas Taubert
Received: 16 March 2016 / Revised: 11 April 2016 / Accepted: 14 April 2016 / Published: 20 April 2016
(This article belongs to the Special Issue Ionic Liquids 2016 and Selected Papers from ILMAT III)
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Abstract

Metal-containing ionic liquids (ILs) are of interest for a variety of technical applications, e.g., particle synthesis and materials with magnetic or thermochromic properties. In this paper we report the synthesis of, and two structures for, some new tetrabromidocuprates(II) with several “onium” cations in comparison to the results of electron paramagnetic resonance (EPR) spectroscopic analyses. The sterically demanding cations were used to separate the paramagnetic Cu(II) ions for EPR measurements. The EPR hyperfine structure in the spectra of these new compounds is not resolved, due to the line broadening resulting from magnetic exchange between the still-incomplete separated paramagnetic Cu(II) centres. For the majority of compounds, the principal g values (g and g) of the tensors could be determined and information on the structural changes in the [CuBr4]2− anions can be obtained. The complexes have high potential, e.g., as ionic liquids, as precursors for the synthesis of copper bromide particles, as catalytically active or paramagnetic ionic liquids. View Full-Text
Keywords: tetrabromidocuprate(II); X-ray structure; electron paramagnetic resonance; copper(II) tetrabromidocuprate(II); X-ray structure; electron paramagnetic resonance; copper(II)
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Zabel, A.; Winter, A.; Kelling, A.; Schilde, U.; Strauch, P. Tetrabromidocuprates(II)—Synthesis, Structure and EPR. Int. J. Mol. Sci. 2016, 17, 596.

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