Abstract: | 1‐Butyl‐3‐methylimidazolium tetrakis‐(bis(trifluoromethanesulfonyl)amide)yttrium(III), bmim]Y(Tf2N)4], was obtained from the ionic liquid 1‐butyl‐3‐methylimidazoliumbis(trifluoromethanesulfonyl)amide, bmim]Tf2N] and yttrium(III)bis(trifluoromethanesulfonyl)amide, Y(Tf2N)3. The crystal structure monoclinic, C2/c (no. 15), a = 2096.(1), b = 1451.5(1), c = 1608.55(9) pm, β = 109.669(6)°, V = 4608.1(5)·106 pm3, Z = 4, R1 for 3874 symmetry independent reflections with I0>2σ(I0): 0.0438] contains YIII coordinated by four Tf2N‐ligands which all adopt a transoid‐conformation with respect to their –CF3 groups. The oxygen coordination polyhedron around YIII can be best described as a trigonal dodecahedron.One 1‐butyl‐3‐methylimidazolium cation compensates for the charge of the complex Y(Tf2N)4]? anion. |