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New Ionic Liquid Compounds Based on Tantalum Pentachloride TaCl 5 : Synthesis, Structural, and Spectroscopic Elucidation of the (μ‐Oxido)‐Chloridotantalates(V) [BMPy][TaCl 6 ], [BMPy] 4 [(TaCl 6 ) 2 (Ta 2 OCl 10 )], and [EMIm] 2 [Ta 2 OCl 10 ]
Author(s) -
Xie Tao,
Brockner Wolfgang,
Gjikaj Mimoza
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201000213
Subject(s) - triclinic crystal system , monoclinic crystal system , chemistry , ionic liquid , tetrafluoroborate , octahedron , crystal structure , crystallography , ionic bonding , space group , raman spectroscopy , x ray crystallography , stereochemistry , medicinal chemistry , organic chemistry , diffraction , ion , physics , optics , catalysis
1‐Butyl‐4‐methylpyridinium hexachloridotantalate(V), [BMPy][TaCl 6 ] ( 1 ), tetrakis(1‐butyl‐4‐methylpyridinium) bis(hexachloridotantalate(V) (μ‐oxido)‐decachloridotantalate(V), [BMPy] 4 [(TaCl 6 ) 2 (Ta 2 OCl 10 )] ( 2 ), and bis(1‐ethyl‐3‐methylimidazolium)‐(μ‐oxido)‐decachloridoditantalate(V), [EMIm] 2 [Ta 2 OCl 10 ] ( 3 ) were synthesized and characterized by single‐crystal X‐ray diffraction and vibrational spectroscopy. Compounds 1 and 3 crystallize in the monoclinic space group P 2 1 / c (no. 14), whereas compound 2 crystallizes in the triclinic space group P $\bar{1}$ (no. 2). All compounds are built up by the mentioned bulky organic cations and octahedral [TaCl 6 ] – respective linear [Ta 2 OCl 10 ] 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 [TaCl 6 ] – ( O h ) and [Ta 2 OCl 10 ] 2– ( C i symmetry, approximately D 4 h ). The melting temperatures of compounds 1 – 3 are given.