Ganesan Kilivelu, Alias Yatimah, Ng Seik Weng
Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Acta Crystallogr C. 2008 Sep;64(Pt 9):o478-80. doi: 10.1107/S0108270108023111. Epub 2008 Aug 9.
Crystallization of the ionic liquid 3,3'-dimethyl-1,1'-(1,4-phenylenedimethylene)diimidazolium bis(tetrafluoroborate), C(16)H(20)N(4)(2+).2BF(4)(-), (I), from its solution in water has permitted the first single-crystal study of an imidazolium-based ionic liquid having a tetrafluoroborate ion as counter-ion. Despite the expectation that the anion would not participate in nonclassical hydrogen bonding, the ionic liquid features C-H...F hydrogen bonds. The dication lies about a center of inversion. The ionic liquid 3,3'-di-n-butyl-1,1'-(1,4-phenylenedimethylene)diimidazolium bis(trifluoromethanesulfonate), C(22)H(32)N(4)(2+).2CF(3)SO(3)(-), (II), features both C-H...F and C-H...O hydrogen bonds.
离子液体3,3'-二甲基-1,1'-(1,4-亚苯基二亚甲基)二咪唑鎓双(四氟硼酸)盐，C(16)H(20)N(4)(2+).2BF(4)(-)，(I)，从其在水中的溶液中结晶，使得首次对以四氟硼酸根离子作为抗衡离子的咪唑鎓基离子液体进行单晶研究成为可能。尽管预期阴离子不会参与非经典氢键，但该离子液体具有C-H...F氢键。双阳离子位于一个对称中心周围。离子液体3,3'-二正丁基-1,1'-(1,4-亚苯基二亚甲基)二咪唑鎓双(三氟甲磺酸盐)，C(22)H(32)N(4)(2+).2CF(3)SO(3)(-)，(II)，具有C-H...F和C-H...O氢键。
