The synthesis of Ba1 was carried out by mixing MeCN solutions of 140 µL of 17 mM DB30C10 (1.3 mg, 2.4 µmol) with 280 µL of 17 mM Bu4NBPh4 (2.7 mg, 4.8 µmol) in a 3 mL glass vial. Then, 150 µL of deionized water was added to the vial. After mixing, 47.5 µL of 50 mM Ba(NO3)2 (0.6 mg, 2.4 µmol) in H2O or D2O was added to the reaction solution, at which time a precipitate formed. The suspension was then briefly stirred to redissolve the precipitate. The vial was covered with Parafilm® and punctured once with an 18-gauge needle to allow for slow evaporation. Rectangular, colorless blocks of the formula [Ba(DB30C10)][BPh4]2•MeCN formed overnight.