Fig. 5. Displacement ellipsoid plot (50% probability) of [K(12-crown-4)2]2(C2B10H10)2·4(THF) (6). Note the lack of C⋯K contact and the complete ion separation. Only a half of the asymmetric unit is shown. Hydrogen atoms on boron atoms of the cluster and carbon atoms of the crown ether ligand have been omitted for clarity. Crystallization solvent molecules (THF) are not shown. Selected interatomic distances (Å): K1⋯C1 = 6.283(1), C1–C2 = 1.712(1), C1–B1 = 1.724(2), C2–B1 = 1.698(2), C2–C2A = 1.532(2) Å.
