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Preparation and Properties of Tri- and Tetrahalogenocuprates(ll) with Ethanolammonium as a Cation

Z. Biela

Department of Inorganic Chemistry, Faculty of Chemical Technology, Slovak Technical University, SK-812 37 Bratislava

 

Abstract: Compounds of the general formula (EA)2CuClxBr4-x and (EA)2Cu2ClxBr6-x (EA = ethanolammonium) were prepared by crystallization from ethanol solutions. Based on spectral data and diffraction powder patterns it has been found that (EA)2Cu2ClxBr6-x are isostructural and possess the same molecular structure. The energies of (EA)2CuClxBr4-x depend on x: for (EA)2CuBr4 (v = 9000 cm-1),the d-d energy corresponds to a distorted tetrahedral structure, while for all other compounds (v = 12600 cm-1; almost-equal-to 10000 cm-1 shoulder) it corresponds to a distorted octahedral structure. (EA)2CuBr4 is not isostructural with any of other tetrahalogenocuprates(II).

Full paper in Portable Document Format: 475a303.pdf

 

Chemical Papers 47 (5) 303–305 (1993)

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