C19H14F4I2N2, monoclinic, I2/a (no. 15), a = 20.997(2) Å, b = 4.4785(3) Å, c = 23.242(3) Å, β = 113.532(14)°, V = 2003.8(4) Å3, Z = 8, Rgt(F) = 0.0684, wRref(F2) = 0.0706, T = 287 K.

Since the first report of geminal dicationic ionic liquids in 2003 1 , much effort has been devoted to the geminal dicationic ionic liquids because their superior physical properties compared to traditional monocationic ionic liquids 2 . The application as solvents in high-temperature reactions 3 , novel high-temperature lubricants 4,5 , ultrastable separation phases 6 and dye sensitized solar cells 7,8 have been reported.It is well known that the chiral monocationic ionic liquids are attractive due to their potential for asymmetric synthesis 9,10 ,

C30H14Br2F4I2N4, monoclinic, P21/c (no. 14), a = 9.4531(3) Å, b = 40.9487(15) Å, c = 7.5118(3) Å, β = 95.110(3)°, V = 2896.20(18) Å3, Z = 4, Rgt(F) = 0.0410, wRref(F2) = 0.0828, T = 287.15(10) K.