New Ionic Liquid Compounds Based on Tantalum Pentachloride TaCl5: Synthesis,Structural, and Spectroscopic Elucidation of the (μ‐Oxido)‐Chloridotantalates(V) [BMPy][TaCl6], [BMPy]4[(TaCl6)2(Ta2OCl10)], and [EMIm]2[Ta2OCl10] |
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Authors: | Tao Xie Wolfgang Brockner PD Dr Mimoza Gjikaj |
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Institution: | Institut für Anorganische und Analytische Chemie, Technische Universit?t Clausthal, Paul‐Ernst‐Strasse 4, 38678 Clausthal‐Zellerfeld, Germany |
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Abstract: | 1‐Butyl‐4‐methylpyridinium hexachloridotantalate(V), BMPy]TaCl6] ( 1 ), tetrakis(1‐butyl‐4‐methylpyridinium) bis(hexachloridotantalate(V) (μ‐oxido)‐decachloridotantalate(V), BMPy]4(TaCl6)2(Ta2OCl10)] ( 2 ), and bis(1‐ethyl‐3‐methylimidazolium)‐(μ‐oxido)‐decachloridoditantalate(V), EMIm]2Ta2OCl10] ( 3 ) were synthesized and characterized by single‐crystal X‐ray diffraction and vibrational spectroscopy. Compounds 1 and 3 crystallize in the monoclinic space group P21/c (no. 14), whereas compound 2 crystallizes in the triclinic space group P (no. 2). All compounds are built up by the mentioned bulky organic cations and octahedral TaCl6]– respective linear Ta2OCl10]2– anions. Coulomb interactions are dominant between the ionic species. FT‐IR and FT‐Raman spectra were recorded and interpreted, especially with respect to the inorganic species TaCl6]– (Oh) and Ta2OCl10]2– (Ci symmetry, approximately D4h). The melting temperatures of compounds 1 – 3 are given. |
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Keywords: | (μ ‐Oxido)‐decachloridoditantalate(V) Hexachloridotantalate(V) Tantalum IR spectroscopy Raman spectroscopy |
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