“…The crystallization of acylthiourea complexes may be relevant to the solvents, the strong hydrogen‐bonding characteristics, modification by substitution,13 or the relative concentration between reactants 14. Starting from the basic molecule of N ‐aryl‐ N ′‐benzoylthiourea, a number of derivatives have been synthesized and structurally characterized with varying aryl rings typically modified by methyl,15 carboxyl,16 phenyl,17 hydroxyl,18 trifluoromethyl,19 ferrocenoyl,10,20 and halide21 substituents. However, the isopropyl group, which has been used as a bulky group in a number of ligand systems,22 was not so common in acylthiourea derivatives 12.…”