Fig. 3: Molecular structure of the anion component of 3 at 150 K and displacement ellipsoids set to 40%.

Hydrogen atoms, minor disorder components, lattice solvent, and the [K(B15C5)2]+ cation component are omitted for clarity. Selected bond lengths (Å): U1-N1, 2.305(5); U1-N2, 2.254(7); U1-N3, 2.312(6); U1-N4, 2.737(5); U1-N5, 1.911(6); B1-N5, 1.581(9).